Citing sources: Overview

  • Citation style guides

Manage your references

Use these tools to help you organize and cite your references:

  • Citation Management and Writing Tools

If you have questions after consulting this guide about how to cite, please contact your advisor/professor or the writing and communication center .

Why citing is important

It's important to cite sources you used in your research for several reasons:

  • To show your reader you've done proper research by listing sources you used to get your information
  • To be a responsible scholar by giving credit to other researchers and acknowledging their ideas
  • To avoid plagiarism by quoting words and ideas used by other authors
  • To allow your reader to track down the sources you used by citing them accurately in your paper by way of footnotes, a bibliography or reference list

About citations

Citing a source means that you show, within the body of your text, that you took words, ideas, figures, images, etc. from another place.

Citations are a short way to uniquely identify a published work (e.g. book, article, chapter, web site).  They are found in bibliographies and reference lists and are also collected in article and book databases.

Citations consist of standard elements, and contain all the information necessary to identify and track down publications, including:

  • author name(s)
  • titles of books, articles, and journals
  • date of publication
  • page numbers
  • volume and issue numbers (for articles)

Citations may look different, depending on what is being cited and which style was used to create them. Choose an appropriate style guide for your needs.  Here is an example of an article citation using four different citation styles.  Notice the common elements as mentioned above:

Author - R. Langer

Article Title - New Methods of Drug Delivery

Source Title - Science

Volume and issue - Vol 249, issue 4976

Publication Date - 1990

Page numbers - 1527-1533

American Chemical Society (ACS) style:

Langer, R. New Methods of Drug Delivery. Science 1990 , 249 , 1527-1533.

IEEE Style:

R. Langer, " New Methods of Drug Delivery," Science , vol. 249 , pp. 1527-1533 , SEP 28, 1990 .

American Psychological Association   (APA) style:

Langer, R. (1990) . New methods of drug delivery. Science , 249 (4976), 1527-1533.

Modern Language Association (MLA) style:

Langer, R. " New Methods of Drug Delivery." Science 249.4976 (1990) : 1527-33.

What to cite

You must cite:

  • Facts, figures, ideas, or other information that is not common knowledge

Publications that must be cited include:  books, book chapters, articles, web pages, theses, etc.

Another person's exact words should be quoted and cited to show proper credit 

When in doubt, be safe and cite your source!

Avoiding plagiarism

Plagiarism occurs when you borrow another's words (or ideas) and do not acknowledge that you have done so. In this culture, we consider our words and ideas intellectual property; like a car or any other possession, we believe our words belong to us and cannot be used without our permission.

Plagiarism is a very serious offense. If it is found that you have plagiarized -- deliberately or inadvertently -- you may face serious consequences. In some instances, plagiarism has meant that students have had to leave the institutions where they were studying.

The best way to avoid plagiarism is to cite your sources - both within the body of your paper and in a bibliography of sources you used at the end of your paper.

Some useful links about plagiarism:

  • MIT Academic Integrity Overview on citing sources and avoiding plagiarism at MIT.
  • Avoiding Plagiarism From the MIT Writing and Communication Center.
  • Plagiarism: What It is and How to Recognize and Avoid It From Indiana University's Writing Tutorial Services.
  • Plagiarism- Overview A resource from Purdue University.
  • Next: Citation style guides >>
  • Last Updated: Jan 16, 2024 7:02 AM
  • URL: https://libguides.mit.edu/citing

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Start your research.

  • Research Process
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  • Evaluate, Write & Cite

Cite your sources

  • is the right thing to do  to give credit to those who had the idea
  • shows that you have read and understand  what experts have had to say about your topic
  • helps people find the sources  that you used in case they want to read more about the topic
  • provides   evidence  for your arguments
  • is professional and  standard practice   for students and scholars

What is a Citation?

A citation identifies for the reader the original source for an idea, information, or image that is referred to in a work.

  • In the body of a paper, the  in-text citation  acknowledges the source of information used.
  • At the end of a paper, the citations are compiled on a  References  or  Works Cited  list. A basic citation includes the author, title, and publication information of the source. 

Citation basics

From:  Lemieux  Library,  University  of Seattle 

Why Should You Cite?

Quoting Are you quoting two or more consecutive words from a source? Then the original source should be cited and the words or phrase placed in quotes. 

Paraphrasing If an idea or information comes from another source,  even if you put it in your own words , you still need to credit the source.  General vs. Unfamiliar Knowledge You do not need to cite material which is accepted common knowledge. If in doubt whether your information is common knowledge or not, cite it. Formats We usually think of books and articles. However, if you use material from web sites, films, music, graphs, tables, etc. you'll also need to cite these as well.

Plagiarism is presenting the words or ideas of someone else as your own without proper acknowledgment of the source. When you work on a research paper and use supporting material from works by others, it's okay to quote people and use their ideas, but you do need to correctly credit them. Even when you summarize or paraphrase information found in books, articles, or Web pages, you must acknowledge the original author.

Citation Style Help

Helpful links:

  • MLA ,  Works Cited : A Quick Guide (a template of core elements)
  • CSE  (Council of Science Editors)

For additional writing resources specific to styles listed here visit the  Purdue OWL Writing Lab

Citation and Bibliography Resources

Writing an annotated bibliography

  • How to Write an Annotated Bibliography
  • Zotero Basics
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  • 11. Citing Sources
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A citation is a formal reference to a published or unpublished source that you consulted and obtained information from while writing your research paper. It refers to a source of information that supports a factual statement, proposition, argument, or assertion or any quoted text obtained from a book, article, web site, or any other type of material . In-text citations are embedded within the body of your paper and use a shorthand notation style that refers to a complete description of the item at the end of the paper. Materials cited at the end of a paper may be listed under the heading References, Sources, Works Cited, or Bibliography. Rules on how to properly cite a source depends on the writing style manual your professor wants you to use for the class [e.g., APA, MLA, Chicago, Turabian, etc.]. Note that some disciplines have their own citation rules [e.g., law].

Citations: Overview. OASIS Writing Center, Walden University; Research and Citation. The Writing Lab and The OWL. Purdue University; Citing Sources. University Writing Center, Texas A&M University.

Reasons for Citing Your Sources

Reasons for Citing Sources in Your Research Paper

English scientist, Sir Isaac Newton, once wrote, "If I have seen further, it is by standing on the shoulders of giants.”* Citations support learning how to "see further" through processes of intellectual discovery, critical thinking, and applying a deliberate method of navigating through the scholarly landscape by tracking how cited works are propagated by scholars over time and the subsequent ways this leads to the devarication of new knowledge.

Listed below are specific reasons why citing sources is an important part of doing good research.

  • Shows the reader where to find more information . Citations help readers expand their understanding and knowledge about the issues being investigated. One of the most effective strategies for locating authoritative, relevant sources about a research problem is to review materials cited in studies published by other authors. In this way, the sources you cite help the reader identify where to go to examine the topic in more depth and detail.
  • Increases your credibility as an author . Citations to the words, ideas, and arguments of scholars demonstrates that you have conducted a thorough review of the literature and, therefore, you are reporting your research results or proposing recommended courses of action from an informed and critically engaged perspective. Your citations offer evidence that you effectively contemplated, evaluated, and synthesized sources of information in relation to your conceptualization of the research problem.
  • Illustrates the non-linear and contested nature of knowledge creation . The sources you cite show the reader how you characterized the dynamics of prior knowledge creation relevant to the research problem and how you managed to effectively identify the contested relationships between problems and solutions proposed among scholars. Citations don't just list materials used in your study, they tell a story about how prior knowledge-making emerged from a constant state of creation, renewal, and transformation.
  • Reinforces your arguments . Sources cited in your paper provide the evidence that readers need to determine that you properly addressed the “So What?” question. This refers to whether you considered the relevance and significance of the research problem, its implications applied to creating new knowledge, and its importance for improving practice. In this way, citations draw attention to and support the legitimacy and originality of your own ideas.
  • Demonstrates that you "listened" to relevant conversations among scholars before joining in . Your citations tell the reader where you developed an understanding of the debates among scholars. They show how you educated yourself about ongoing conversations taking place within relevant communities of researchers before inserting your own ideas and arguments. In peer-reviewed scholarship, most of these conversations emerge within books, research reports, journal articles, and other cited works.
  • Delineates alternative approaches to explaining the research problem . If you disagree with prior research assumptions or you believe that a topic has been understudied or you find that there is a gap in how scholars have understood a problem, your citations serve as the source materials from which to analyze and present an alternative viewpoint or to assert that a different course of action should be pursued. In short, the materials you cite serve as the means by which to argue persuasively against long-standing assumptions propagated in prior studies.
  • Helps the reader understand contextual aspects of your research . Cited sources help readers understand the specific circumstances, conditions, and settings of the problem being investigated and, by extension, how your arguments can be fully understood and assessed. Citations place your line of reasoning within a specific contextualized framework based on how others have studied the problem and how you interpreted their findings in support of your overall research objectives.
  • Frames the development of concepts and ideas within the literature . No topic in the social and behavioral sciences rests in isolation from research that has taken place in the past. Your citations help the reader understand the growth and transformation of the theoretical assumptions, key concepts, and systematic inquiries that emerged prior to your engagement with the research problem.
  • Underscores what sources were most important to you . Your citations represent a set of choices made about what you determined to be the most important sources for understanding the topic. They not only list what you discovered, but why it matters and how the materials you chose to cite fit within the broader context of your research design and arguments. As part of an overall assessment of the study’s validity and reliability , the choices you make also helps the reader determine what research may have been excluded.
  • Provides evidence of interdisciplinary thinking . An important principle of good research is to extend your review of the literature beyond the predominant disciplinary space where scholars have examined a topic. Citations provide evidence that you have integrated epistemological arguments, observations, and/or the methodological strategies from other disciplines into your paper, thereby demonstrating that you understand the complex, interconnected nature of contemporary research problems.
  • Supports critical thinking and independent learning . Evaluating the authenticity, reliability, validity, and originality of prior research is an act of interpretation and introspective reasoning applied to assessing whether a source of information will contribute to understanding the problem in ways that are persuasive and align with your overall research objectives. Reviewing and citing prior studies represents a deliberate act of critically scrutinizing each source as part of your overall assessment of how scholars have confronted the research problem.
  • Honors the achievements of others . As Susan Blum recently noted,** citations not only identify sources used, they acknowledge the achievements of scholars within the larger network of research about the topic. Citing sources is a normative act of professionalism within academe and a way to highlight and recognize the work of scholars who likely do not obtain any tangible benefits or monetary value from their research endeavors.

*Vernon. Jamie L. "On the Shoulder of Giants." American Scientist 105 (July-August 2017): 194.

**Blum, Susan D. "In Defense of the Morality of Citation.” Inside Higher Ed , January 29, 2024.

Aksnes, Dag W., Liv Langfeldt, and Paul Wouters. "Citations, Citation Indicators, and Research Quality: An Overview of Basic Concepts and Theories." Sage Open 9 (January-March 2019): https://doi.org/10.1177/2158244019829575; Blum, Susan Debra. My Word!: Plagiarism and College Culture . Ithaca, NY: Cornell University Press, 2009; Bretag, Tracey., editor. Handbook of Academic Integrity . Singapore: Springer Singapore, 2020; Ballenger, Bruce P. The Curious Researcher: A Guide to Writing Research Papers . 7th edition. Boston, MA: Pearson, 2012; D'Angelo, Barbara J. "Using Source Analysis to Promote Critical Thinking." Research Strategies 18 (Winter 2001): 303-309; Mauer, Barry and John Venecek. “Scholarship as Conversation.” Strategies for Conducting Literary Research, University of Central Florida, 2021; Why Cite? Poorvu Center for Teaching and Learning, Yale University; Citing Information. The Writing Center. University of North Carolina; Harvard Guide to Using Sources. Harvard College Writing Program. Harvard University; Newton, Philip. "Academic Integrity: A Quantitative Study of Confidence and Understanding in Students at the Start of Their Higher Education."  Assessment and Evaluation in Higher Education 41 (2016): 482-497; Referencing More Effectively. Academic Skills Centre. University of Canberra; Using Sources. Yale College Writing Center. Yale University; Vosburgh, Richard M. "Closing the Academic-practitioner Gap: Research Must Answer the “SO WHAT” Question." H uman Resource Management Review 32 (March 2022): 100633; When and Why to Cite Sources. Information Literacy Playlists, SUNY, Albany Libraries.

Structure and Writing Style

Referencing your sources means systematically showing what information or ideas you acquired from another author’s work, and identifying where that information come from . You must cite research in order to do research, but at the same time, you must delineate what are your original thoughts and ideas and what are the thoughts and ideas of others. Citations help achieve this. Procedures used to cite sources vary among different fields of study. If not outlined in your course syllabus or writing assignment, always speak with your professor about what writing style for citing sources should be used for the class because it is important to fully understand the citation style to be used in your paper, and to apply it consistently. If your professor defers and tells you to "choose whatever you want, just be consistent," then choose the citation style you are most familiar with or that is appropriate to your major [e.g., use Chicago style if its a history class; use APA if its an education course; use MLA if it is literature or a general writing course].

GENERAL GUIDELINES

1. Are there any reasons I should avoid referencing other people's work? No. If placed in the proper context, r eferencing other people's research is never an indication that your work is substandard or lacks originality. In fact, the opposite is true. If you write your paper without adequate references to previous studies, you are signaling to the reader that you are not familiar with the literature on the topic, thereby, undermining the validity of your study and your credibility as a researcher. Including references in academic writing is one of the most important ways to demonstrate your knowledge and understanding of how the research problem has been addressed. It is the intellectual packaging around which you present your thoughts and ideas to the reader.

2. What should I do if I find out that my great idea has already been studied by another researcher? It can be frustrating to come up with what you believe is a great topic only to find that it's already been thoroughly studied. However, do not become frustrated by this. You can acknowledge the prior research by writing in the text of your paper [see also Smith, 2002], then citing the complete source in your list of references. Use the discovery of prior studies as an opportunity to demonstrate the significance of the problem being investigated and, if applicable, as a means of delineating your analysis from those of others [e.g., the prior study is ten years old and doesn't take into account new variables]. Strategies for responding to prior research can include: stating how your study updates previous understandings about the topic, offering a new or different perspective, applying a different or innovative method of data gathering, and/or describing a new set of insights, guidelines, recommendations, best practices, or working solutions.

3. What should I do if I want to use an adapted version of someone else's work? You still must cite the original work. For example, maybe you are using a table of statistics from a journal article published in 1996 by author Smith, but you have altered or added new data to it. Reference the revised chart, such as, [adapted from Smith, 1996], then cite the complete source in your list of references. You can also use other terms in order to specify the exact relationship between the original source and the version you have presented, such as, "based on data from Smith [1996]...," or "summarized from Smith [1996]...." Citing the original source helps the reader locate where the information was first presented and under what context it was used as well as to evaluate how effectively you applied it to your own research.

4. What should I do if several authors have published very similar information or ideas? You can indicate that the idea or information can be found in the works of others by stating something similar to the following example: "Though many scholars have applied rational choice theory to understanding economic relations among nations [Smith, 1989; Jones, 1991; Johnson, 1994; Anderson, 2003], little attention has been given to applying the theory to examining the influence of non-governmental organizations in a globalized economy." If you only reference one author or only the most recent study, then your readers may assume that only one author has published on this topic, or more likely, they will conclude that you have not conducted a thorough literature review. Referencing all relevant authors of prior studies gives your readers a clear idea of the breadth of analysis you conducted in preparing to study the research problem. If there has been a significant number of prior studies on the topic, describe the most comprehensive and recent works because they will presumably discuss and reference the older studies. However, note in your review of the literature that there has been significant scholarship devoted to the topic so the reader knows that you are aware of the numerous prior studies.

5. What if I find exactly what I want to say in the writing of another researcher? In the social sciences, the rationale in duplicating prior research is generally governed by the passage of time, changing circumstances or conditions, or the emergence of variables that necessitate a new investigation . If someone else has recently conducted a thorough investigation of precisely the same research problem that you intend to study, then you likely will have to revise your topic, or at the very least, review this literature to identify something new to say about the problem. However, if it is someone else's particularly succinct expression, but it fits perfectly with what you are trying to say, then you can quote from the author directly, referencing the source. Identifying an author who has made the exact same point that you want to make can be an opportunity to add legitimacy to, as well as reinforce the significance of, the research problem you are investigating. The key is to build on that idea in new and innovative ways. If you are not sure how to do this, consult with a librarian .

6. Should I cite a source even if it was published long ago? Any source used in writing your paper should be cited, regardless of when it was written. However, in building a case for understanding prior research about your topic, it is generally true that you should focus on citing more recently published studies because they presumably have built upon the research of older studies. When referencing prior studies, use the research problem as your guide when considering what to cite. If a study from forty years ago investigated the same topic, it probably should be examined and considered in your list of references because the research may have been foundational or groundbreaking at the time, even if its findings are no longer relevant to current conditions or reflect current thinking [one way to determine if a study is foundational or groundbreaking is to examine how often it has been cited in recent studies using the "Cited by" feature of Google Scholar ]. However, if an older study only relates to the research problem tangentially or it has not been cited in recent studies, then it may be more appropriate to list it under further readings .

NOTE:   In any academic writing, you are required to identify which ideas, facts, thoughts, concepts, or declarative statements are yours and which are derived from the research of others. The only exception to this rule is information that is considered to be a commonly known fact [e.g., "George Washington was the first president of the United States"] or a statement that is self-evident [e.g., "Australia is a country in the Global South"]. Appreciate, however, that any "commonly known fact" is culturally constructed and shaped by social and aesthetical biases . If you are in doubt about whether or not a fact is considered to be widely understood knowledge, provide a supporting citation, or, ask your professor for clarification about how the statement should be cited.

Ballenger, Bruce P. The Curious Researcher: A Guide to Writing Research Papers . 7th edition. Boston, MA: Pearson, 2012; Blum, Susan Debra. My Word!: Plagiarism and College Culture . Ithaca, NY: Cornell University Press, 2009; Bretag, Tracey., editor. Handbook of Academic Integrity . Singapore: Springer Singapore, 2020; Carlock, Janine. Developing Information Literacy Skills: A Guide to Finding, Evaluating, and Citing Sources . Ann Arbor, MI: University of Michigan Press, 2020; Harvard Guide to Using Sources. Harvard College Writing Program. Harvard University; How to Cite Other Sources in Your Paper. The Structure, Format, Content, and Style of a Journal-Style Scientific Paper. Department of Biology. Bates College; Lunsford, Andrea A. and Robert Connors; The St. Martin's Handbook . New York: St. Martin's Press, 1989; Mills, Elizabeth Shown. Evidence Explained: Citing History Sources from Artifacts to Cyberspace . 3rd edition. Baltimore, MD: Genealogical Publishing Company, 2015; Research and Citation Resources. The Writing Lab and The OWL. Purdue University; Writing Tutorial Services, Center for Innovative Teaching and Learning. Indiana University; Why Cite? Poorvu Center for Teaching and Learning, Yale Univeraity.

Other Citation Research Guides

The following USC Libraries research guide can help you properly cite sources in your research paper:

  • Citation Guide

The following USC Libraries research guide offers basic information on using images and media in research:

Listed below are particularly well-done and comprehensive websites that provide specific examples of how to cite sources under different style guidelines.

  • Purdue University Online Writing Lab
  • Southern Cross University Harvard Referencing Style
  • University of Wisconsin Writing Center

This is a useful guide concerning how to properly cite images in your research paper.

  • Colgate Visual Resources Library, Citing Images

This guide provides good information on the act of citation analysis, whereby you count the number of times a published work is cited by other works in order to measure the impact of a publication or author.

Measuring Your Impact: Impact Factor, Citation Analysis, and other Metrics: Citation Analysis [Sandy De Groote, University of Illinois, Chicago]

Automatic Citation Generators

The links below lead to systems where you can type in your information and have a citation compiled for you. Note that these systems are not foolproof so it is important that you verify that the citation is correct and check your spelling, capitalization, etc. However, they can be useful in creating basic types of citations, particularly for online sources.

  • BibMe -- APA, MLA, Chicago, and Turabian styles
  • DocsCite -- for citing government publications in APA or MLA formats
  • EasyBib -- APA, MLA, and Chicago styles
  • Son of Citation Machine -- APA, MLA, Chicago, and Turabian styles

NOTE:   Many companies that create the research databases the USC Libraries subscribe to, such as ProQuest , include built-in citation generators that help take the guesswork out of how to properly cite a work. When available, you should always utilize these features because they not only generate a citation to the source [e.g., a journal article], but include information about where you accessed the source [e.g., the database].

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  • Referencing

A Quick Guide to Referencing | Cite Your Sources Correctly

Referencing means acknowledging the sources you have used in your writing. Including references helps you support your claims and ensures that you avoid plagiarism .

There are many referencing styles, but they usually consist of two things:

  • A citation wherever you refer to a source in your text.
  • A reference list or bibliography at the end listing full details of all your sources.

The most common method of referencing in UK universities is Harvard style , which uses author-date citations in the text. Our free Harvard Reference Generator automatically creates accurate references in this style.

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Table of contents

Referencing styles, citing your sources with in-text citations, creating your reference list or bibliography, harvard referencing examples, frequently asked questions about referencing.

Each referencing style has different rules for presenting source information. For in-text citations, some use footnotes or endnotes , while others include the author’s surname and date of publication in brackets in the text.

The reference list or bibliography is presented differently in each style, with different rules for things like capitalisation, italics, and quotation marks in references.

Your university will usually tell you which referencing style to use; they may even have their own unique style. Always follow your university’s guidelines, and ask your tutor if you are unsure. The most common styles are summarised below.

Harvard referencing, the most commonly used style at UK universities, uses author–date in-text citations corresponding to an alphabetical bibliography or reference list at the end.

Harvard Referencing Guide

Vancouver referencing, used in biomedicine and other sciences, uses reference numbers in the text corresponding to a numbered reference list at the end.

Vancouver Referencing Guide

APA referencing, used in the social and behavioural sciences, uses author–date in-text citations corresponding to an alphabetical reference list at the end.

APA Referencing Guide APA Reference Generator

MHRA referencing, used in the humanities, uses footnotes in the text with source information, in addition to an alphabetised bibliography at the end.

MHRA Referencing Guide

OSCOLA referencing, used in law, uses footnotes in the text with source information, and an alphabetical bibliography at the end in longer texts.

OSCOLA Referencing Guide

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In-text citations should be used whenever you quote, paraphrase, or refer to information from a source (e.g. a book, article, image, website, or video).

Quoting and paraphrasing

Quoting is when you directly copy some text from a source and enclose it in quotation marks to indicate that it is not your own writing.

Paraphrasing is when you rephrase the original source into your own words. In this case, you don’t use quotation marks, but you still need to include a citation.

In most referencing styles, page numbers are included when you’re quoting or paraphrasing a particular passage. If you are referring to the text as a whole, no page number is needed.

In-text citations

In-text citations are quick references to your sources. In Harvard referencing, you use the author’s surname and the date of publication in brackets.

Up to three authors are included in a Harvard in-text citation. If the source has more than three authors, include the first author followed by ‘ et al. ‘

The point of these citations is to direct your reader to the alphabetised reference list, where you give full information about each source. For example, to find the source cited above, the reader would look under ‘J’ in your reference list to find the title and publication details of the source.

Placement of in-text citations

In-text citations should be placed directly after the quotation or information they refer to, usually before a comma or full stop. If a sentence is supported by multiple sources, you can combine them in one set of brackets, separated by a semicolon.

If you mention the author’s name in the text already, you don’t include it in the citation, and you can place the citation immediately after the name.

  • Another researcher warns that the results of this method are ‘inconsistent’ (Singh, 2018, p. 13) .
  • Previous research has frequently illustrated the pitfalls of this method (Singh, 2018; Jones, 2016) .
  • Singh (2018, p. 13) warns that the results of this method are ‘inconsistent’.

The terms ‘bibliography’ and ‘reference list’ are sometimes used interchangeably. Both refer to a list that contains full information on all the sources cited in your text. Sometimes ‘bibliography’ is used to mean a more extensive list, also containing sources that you consulted but did not cite in the text.

A reference list or bibliography is usually mandatory, since in-text citations typically don’t provide full source information. For styles that already include full source information in footnotes (e.g. OSCOLA and Chicago Style ), the bibliography is optional, although your university may still require you to include one.

Format of the reference list

Reference lists are usually alphabetised by authors’ last names. Each entry in the list appears on a new line, and a hanging indent is applied if an entry extends onto multiple lines.

Harvard reference list example

Different source information is included for different source types. Each style provides detailed guidelines for exactly what information should be included and how it should be presented.

Below are some examples of reference list entries for common source types in Harvard style.

  • Chapter of a book
  • Journal article

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Your university should tell you which referencing style to follow. If you’re unsure, check with a supervisor. Commonly used styles include:

  • Harvard referencing , the most commonly used style in UK universities.
  • MHRA , used in humanities subjects.
  • APA , used in the social sciences.
  • Vancouver , used in biomedicine.
  • OSCOLA , used in law.

Your university may have its own referencing style guide.

If you are allowed to choose which style to follow, we recommend Harvard referencing, as it is a straightforward and widely used style.

References should be included in your text whenever you use words, ideas, or information from a source. A source can be anything from a book or journal article to a website or YouTube video.

If you don’t acknowledge your sources, you can get in trouble for plagiarism .

To avoid plagiarism , always include a reference when you use words, ideas or information from a source. This shows that you are not trying to pass the work of others off as your own.

You must also properly quote or paraphrase the source. If you’re not sure whether you’ve done this correctly, you can use the Scribbr Plagiarism Checker to find and correct any mistakes.

Harvard referencing uses an author–date system. Sources are cited by the author’s last name and the publication year in brackets. Each Harvard in-text citation corresponds to an entry in the alphabetised reference list at the end of the paper.

Vancouver referencing uses a numerical system. Sources are cited by a number in parentheses or superscript. Each number corresponds to a full reference at the end of the paper.

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Citing Sources: What are citations and why should I use them?

What is a citation.

Citations are a way of giving credit when certain material in your work came from another source. It also gives your readers the information necessary to find that source again-- it provides an important roadmap to your research process. Whenever you use sources such as books, journals or websites in your research, you must give credit to the original author by citing the source. 

Why do researchers cite?

Scholarship is a conversation  and scholars use citations not only to  give credit  to original creators and thinkers, but also to  add strength and authority  to their own work.  By citing their sources, scholars are  placing their work in a specific context  to show where they “fit” within the larger conversation.  Citations are also a great way to  leave a trail  intended to help others who may want to explore the conversation or use the sources in their own work.

In short, citations

(1) give credit

(2) add strength and authority to your work

(3) place your work in a specific context

(4) leave a trail for other scholars

"Good citations should reveal your sources, not conceal them. They should honeslty reflect the research you conducted." (Lipson 4)

Lipson, Charles. "Why Cite?"  Cite Right: A Quick Guide to Citation Styles--MLA, APA, Chicago, the Sciences, Professions, and More . Chicago: U of Chicago, 2006. Print.

What does a citation look like?

Different subject disciplines call for citation information to be written in very specific order, capitalization, and punctuation. There are therefore many different style formats. Three popular citation formats are MLA Style (for humanities articles) and APA or Chicago (for social sciences articles).

MLA style (print journal article):  

Whisenant, Warren A. "How Women Have Fared as Interscholastic Athletic Administrators Since the Passage of Title IX." Sex Roles Vol. 49.3 (2003): 179-182.

APA style (print journal article):

Whisenant, W. A. (2003) How Women Have Fared as Interscholastic Athletic Administrators Since the Passage of Title IX. Sex Roles , 49 (3), 179-182.

Chicago style (print journal article):

Whisenant, Warren A. "How Women Have Fared as Interscholastic Athletic Administrators Since the Passage of Title IX." Sex Roles 49, no. 3 (2003): 179-182.

No matter which style you use, all citations require the same basic information:

  • Author or Creator
  • Container (e.g., Journal or magazine, website, edited book)
  • Date of creation or publication
  • Publisher 

You are most likely to have easy access to all of your citation information when you find it in the first place. Take note of this information up front, and it will be much easier to cite it effectively later.

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When you write a research paper, you use information and facts from a variety of resources to support your own ideas or to help you develop new ones. Books, articles, videos, interviews, and Web sites are some examples of sources you might use.

Citing these sources of information in your work is essential because:

  • It gives credit to the author of the original work who provided you with the information or idea
  • It allows your audience to identify and find the source material in order to learn more about your topic
  • It gives your paper more credibility because it shows you're supporting your arguments with high-quality source. It also helps earn your readers' trust because you're telling your readers the source of your facts so that they can confirm them for themselves
  • It helps you avoid plagiarism

Watch this short video from The Learning Portal to learn why you cite and when you cite. Watch, Learn, and Enjoy!

"Why You Need to Cite Sources" by The Learning Portal is licensed under CC BY-NC-SA 4.0

Whether you mean to do it or not, plagiarism is stealing. This brief video from Eastern Gateway Community College explains plagiarism and shows you ways you can avoid it.

Plagiarism does not apply only to written works; it also applies to images, graphics, charts, music, videos, etc. that you use in your research.

This form of Academic dishonesty applies to individual as well as group work and may result in partial credit, no credit, or failure of the exam or assignment. In addition, your instructor may forward the situation to the Office of Student Success for further disciplinary action such as suspension or removal from the course or college in accordance with the YCCD Board Policy and Procedure 5500: Standards of Student Conduct.

  • Standards of Student Conduct

It's important to make sure you collect all the information you need to cite a source as you gather your information so that you won't need to look it up again, so:

  • Take clear, accurate notes about where you found specific ideas
  • Write down the complete citation information for each book, article, etc. you use as you go along
  • Use quotation marks when directly stating another person's words
  • Always credit original authors for their information and ideas

Cite all outside sources you use in your research paper! Citing is required for sources you:

Quote  word-for-word,

Paraphrase  (rewrite using your own words), and

Summarize (rewrite the main concept or idea in your own words) .

As you explore your topic, you'll discover and read information from many different sources. With each new source, you'll need to decide if you want to use it. To help you make this decision, you'll ask yourself questions about the source like:

Each of these elements (author, title, publisher, location, publication date) will become part of your citation. As you work, you'll want to keep track of each of these elements so that creating your citations will be easier.

How citing your sources affects your paper

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MLA In-Text Citations: The Basics

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MLA (Modern Language Association) style is most commonly used to write papers and cite sources within the liberal arts and humanities. This resource, updated to reflect the MLA Handbook (9 th ed.), offers examples for the general format of MLA research papers, in-text citations, endnotes/footnotes, and the Works Cited page.

Guidelines for referring to the works of others in your text using MLA style are covered throughout the  MLA Handbook  and in chapter 7 of the  MLA Style Manual . Both books provide extensive examples, so it's a good idea to consult them if you want to become even more familiar with MLA guidelines or if you have a particular reference question.

Basic in-text citation rules

In MLA Style, referring to the works of others in your text is done using parenthetical citations . This method involves providing relevant source information in parentheses whenever a sentence uses a quotation or paraphrase. Usually, the simplest way to do this is to put all of the source information in parentheses at the end of the sentence (i.e., just before the period). However, as the examples below will illustrate, there are situations where it makes sense to put the parenthetical elsewhere in the sentence, or even to leave information out.

General Guidelines

  • The source information required in a parenthetical citation depends (1) upon the source medium (e.g. print, web, DVD) and (2) upon the source’s entry on the Works Cited page.
  • Any source information that you provide in-text must correspond to the source information on the Works Cited page. More specifically, whatever signal word or phrase you provide to your readers in the text must be the first thing that appears on the left-hand margin of the corresponding entry on the Works Cited page.

In-text citations: Author-page style

MLA format follows the author-page method of in-text citation. This means that the author's last name and the page number(s) from which the quotation or paraphrase is taken must appear in the text, and a complete reference should appear on your Works Cited page. The author's name may appear either in the sentence itself or in parentheses following the quotation or paraphrase, but the page number(s) should always appear in the parentheses, not in the text of your sentence. For example:

Both citations in the examples above, (263) and (Wordsworth 263), tell readers that the information in the sentence can be located on page 263 of a work by an author named Wordsworth. If readers want more information about this source, they can turn to the Works Cited page, where, under the name of Wordsworth, they would find the following information:

Wordsworth, William. Lyrical Ballads . Oxford UP, 1967.

In-text citations for print sources with known author

For print sources like books, magazines, scholarly journal articles, and newspapers, provide a signal word or phrase (usually the author’s last name) and a page number. If you provide the signal word/phrase in the sentence, you do not need to include it in the parenthetical citation.

These examples must correspond to an entry that begins with Burke, which will be the first thing that appears on the left-hand margin of an entry on the Works Cited page:

Burke, Kenneth. Language as Symbolic Action: Essays on Life, Literature, and Method . University of California Press, 1966.

In-text citations for print sources by a corporate author

When a source has a corporate author, it is acceptable to use the name of the corporation followed by the page number for the in-text citation. You should also use abbreviations (e.g., nat'l for national) where appropriate, so as to avoid interrupting the flow of reading with overly long parenthetical citations.

In-text citations for sources with non-standard labeling systems

If a source uses a labeling or numbering system other than page numbers, such as a script or poetry, precede the citation with said label. When citing a poem, for instance, the parenthetical would begin with the word “line”, and then the line number or range. For example, the examination of William Blake’s poem “The Tyger” would be cited as such:

The speaker makes an ardent call for the exploration of the connection between the violence of nature and the divinity of creation. “In what distant deeps or skies. / Burnt the fire of thine eyes," they ask in reference to the tiger as they attempt to reconcile their intimidation with their relationship to creationism (lines 5-6).

Longer labels, such as chapters (ch.) and scenes (sc.), should be abbreviated.

In-text citations for print sources with no known author

When a source has no known author, use a shortened title of the work instead of an author name, following these guidelines.

Place the title in quotation marks if it's a short work (such as an article) or italicize it if it's a longer work (e.g. plays, books, television shows, entire Web sites) and provide a page number if it is available.

Titles longer than a standard noun phrase should be shortened into a noun phrase by excluding articles. For example, To the Lighthouse would be shortened to Lighthouse .

If the title cannot be easily shortened into a noun phrase, the title should be cut after the first clause, phrase, or punctuation:

In this example, since the reader does not know the author of the article, an abbreviated title appears in the parenthetical citation, and the full title of the article appears first at the left-hand margin of its respective entry on the Works Cited page. Thus, the writer includes the title in quotation marks as the signal phrase in the parenthetical citation in order to lead the reader directly to the source on the Works Cited page. The Works Cited entry appears as follows:

"The Impact of Global Warming in North America." Global Warming: Early Signs . 1999. www.climatehotmap.org/. Accessed 23 Mar. 2009.

If the title of the work begins with a quotation mark, such as a title that refers to another work, that quote or quoted title can be used as the shortened title. The single quotation marks must be included in the parenthetical, rather than the double quotation.

Parenthetical citations and Works Cited pages, used in conjunction, allow readers to know which sources you consulted in writing your essay, so that they can either verify your interpretation of the sources or use them in their own scholarly work.

Author-page citation for classic and literary works with multiple editions

Page numbers are always required, but additional citation information can help literary scholars, who may have a different edition of a classic work, like Marx and Engels's  The Communist Manifesto . In such cases, give the page number of your edition (making sure the edition is listed in your Works Cited page, of course) followed by a semicolon, and then the appropriate abbreviations for volume (vol.), book (bk.), part (pt.), chapter (ch.), section (sec.), or paragraph (par.). For example:

Author-page citation for works in an anthology, periodical, or collection

When you cite a work that appears inside a larger source (for instance, an article in a periodical or an essay in a collection), cite the author of the  internal source (i.e., the article or essay). For example, to cite Albert Einstein's article "A Brief Outline of the Theory of Relativity," which was published in  Nature  in 1921, you might write something like this:

See also our page on documenting periodicals in the Works Cited .

Citing authors with same last names

Sometimes more information is necessary to identify the source from which a quotation is taken. For instance, if two or more authors have the same last name, provide both authors' first initials (or even the authors' full name if different authors share initials) in your citation. For example:

Citing a work by multiple authors

For a source with two authors, list the authors’ last names in the text or in the parenthetical citation:

Corresponding Works Cited entry:

Best, David, and Sharon Marcus. “Surface Reading: An Introduction.” Representations , vol. 108, no. 1, Fall 2009, pp. 1-21. JSTOR, doi:10.1525/rep.2009.108.1.1

For a source with three or more authors, list only the first author’s last name, and replace the additional names with et al.

Franck, Caroline, et al. “Agricultural Subsidies and the American Obesity Epidemic.” American Journal of Preventative Medicine , vol. 45, no. 3, Sept. 2013, pp. 327-333.

Citing multiple works by the same author

If you cite more than one work by an author, include a shortened title for the particular work from which you are quoting to distinguish it from the others. Put short titles of books in italics and short titles of articles in quotation marks.

Citing two articles by the same author :

Citing two books by the same author :

Additionally, if the author's name is not mentioned in the sentence, format your citation with the author's name followed by a comma, followed by a shortened title of the work, and, when appropriate, the page number(s):

Citing multivolume works

If you cite from different volumes of a multivolume work, always include the volume number followed by a colon. Put a space after the colon, then provide the page number(s). (If you only cite from one volume, provide only the page number in parentheses.)

Citing the Bible

In your first parenthetical citation, you want to make clear which Bible you're using (and underline or italicize the title), as each version varies in its translation, followed by book (do not italicize or underline), chapter, and verse. For example:

If future references employ the same edition of the Bible you’re using, list only the book, chapter, and verse in the parenthetical citation:

John of Patmos echoes this passage when describing his vision (Rev. 4.6-8).

Citing indirect sources

Sometimes you may have to use an indirect source. An indirect source is a source cited within another source. For such indirect quotations, use "qtd. in" to indicate the source you actually consulted. For example:

Note that, in most cases, a responsible researcher will attempt to find the original source, rather than citing an indirect source.

Citing transcripts, plays, or screenplays

Sources that take the form of a dialogue involving two or more participants have special guidelines for their quotation and citation. Each line of dialogue should begin with the speaker's name written in all capitals and indented half an inch. A period follows the name (e.g., JAMES.) . After the period, write the dialogue. Each successive line after the first should receive an additional indentation. When another person begins speaking, start a new line with that person's name indented only half an inch. Repeat this pattern each time the speaker changes. You can include stage directions in the quote if they appear in the original source.

Conclude with a parenthetical that explains where to find the excerpt in the source. Usually, the author and title of the source can be given in a signal phrase before quoting the excerpt, so the concluding parenthetical will often just contain location information like page numbers or act/scene indicators.

Here is an example from O'Neill's  The Iceman Cometh.

WILLIE. (Pleadingly) Give me a drink, Rocky. Harry said it was all right. God, I need a drink.

ROCKY. Den grab it. It's right under your nose.

WILLIE. (Avidly) Thanks. (He takes the bottle with both twitching hands and tilts it to his lips and gulps down the whiskey in big swallows.) (1.1)

Citing non-print or sources from the Internet

With more and more scholarly work published on the Internet, you may have to cite sources you found in digital environments. While many sources on the Internet should not be used for scholarly work (reference the OWL's  Evaluating Sources of Information  resource), some Web sources are perfectly acceptable for research. When creating in-text citations for electronic, film, or Internet sources, remember that your citation must reference the source on your Works Cited page.

Sometimes writers are confused with how to craft parenthetical citations for electronic sources because of the absence of page numbers. However, these sorts of entries often do not require a page number in the parenthetical citation. For electronic and Internet sources, follow the following guidelines:

  • Include in the text the first item that appears in the Work Cited entry that corresponds to the citation (e.g. author name, article name, website name, film name).
  • Do not provide paragraph numbers or page numbers based on your Web browser’s print preview function.
  • Unless you must list the Web site name in the signal phrase in order to get the reader to the appropriate entry, do not include URLs in-text. Only provide partial URLs such as when the name of the site includes, for example, a domain name, like  CNN.com  or  Forbes.com,  as opposed to writing out http://www.cnn.com or http://www.forbes.com.

Miscellaneous non-print sources

Two types of non-print sources you may encounter are films and lectures/presentations:

In the two examples above “Herzog” (a film’s director) and “Yates” (a presentor) lead the reader to the first item in each citation’s respective entry on the Works Cited page:

Herzog, Werner, dir. Fitzcarraldo . Perf. Klaus Kinski. Filmverlag der Autoren, 1982.

Yates, Jane. "Invention in Rhetoric and Composition." Gaps Addressed: Future Work in Rhetoric and Composition, CCCC, Palmer House Hilton, 2002. Address.

Electronic sources

Electronic sources may include web pages and online news or magazine articles:

In the first example (an online magazine article), the writer has chosen not to include the author name in-text; however, two entries from the same author appear in the Works Cited. Thus, the writer includes both the author’s last name and the article title in the parenthetical citation in order to lead the reader to the appropriate entry on the Works Cited page (see below).

In the second example (a web page), a parenthetical citation is not necessary because the page does not list an author, and the title of the article, “MLA Formatting and Style Guide,” is used as a signal phrase within the sentence. If the title of the article was not named in the sentence, an abbreviated version would appear in a parenthetical citation at the end of the sentence. Both corresponding Works Cited entries are as follows:

Taylor, Rumsey. "Fitzcarraldo." Slant , 13 Jun. 2003, www.slantmagazine.com/film/review/fitzcarraldo/. Accessed 29 Sep. 2009. 

"MLA Formatting and Style Guide." The Purdue OWL , 2 Aug. 2016, owl.english.purdue.edu/owl/resource/747/01/. Accessed 2 April 2018.

Multiple citations

To cite multiple sources in the same parenthetical reference, separate the citations by a semi-colon:

Time-based media sources

When creating in-text citations for media that has a runtime, such as a movie or podcast, include the range of hours, minutes and seconds you plan to reference. For example: (00:02:15-00:02:35).

When a citation is not needed

Common sense and ethics should determine your need for documenting sources. You do not need to give sources for familiar proverbs, well-known quotations, or common knowledge (For example, it is expected that U.S. citizens know that George Washington was the first President.). Remember that citing sources is a rhetorical task, and, as such, can vary based on your audience. If you’re writing for an expert audience of a scholarly journal, for example, you may need to deal with expectations of what constitutes “common knowledge” that differ from common norms.

Other Sources

The MLA Handbook describes how to cite many different kinds of authors and content creators. However, you may occasionally encounter a source or author category that the handbook does not describe, making the best way to proceed can be unclear.

In these cases, it's typically acceptable to apply the general principles of MLA citation to the new kind of source in a way that's consistent and sensible. A good way to do this is to simply use the standard MLA directions for a type of source that resembles the source you want to cite.

You may also want to investigate whether a third-party organization has provided directions for how to cite this kind of source. For example, Norquest College provides guidelines for citing Indigenous Elders and Knowledge Keepers⁠ —an author category that does not appear in the MLA Handbook . In cases like this, however, it's a good idea to ask your instructor or supervisor whether using third-party citation guidelines might present problems.

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Citation Examples | Books, Articles, Websites & More

Published on April 9, 2021 by Jack Caulfield . Revised on January 17, 2024.

The most common citation styles are APA and MLA . To cite a source in these styles, you need a brief in-text citation and a full reference.

Use the interactive tool to understand how a citation is structured and see examples for common source types .

As well as switching between styles and sources, you can explore how a citation looks when there are multiple authors, different editions, no publication date, and other common scenarios.

If you’re still not sure how to cite your source correctly, dive into our comprehensive articles. For each source type, we provide a range of examples in APA , MLA , and Chicago style .

Cite this Scribbr article

If you want to cite this source, you can copy and paste the citation or click the “Cite this Scribbr article” button to automatically add the citation to our free Citation Generator.

Caulfield, J. (2024, January 17). Citation Examples | Books, Articles, Websites & More. Scribbr. Retrieved February 22, 2024, from https://www.scribbr.com/citing-sources/citation-example/

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Looking for a book, article, database or something else for your research, what is plagiarism.

Plagiarism is defined as "a piece of writing that has been copied from someone else and is presented as being your own work" or "taking someone's words or ideas as if they were your own"  [ 1 ]

Plagiarism is a serious issue in the academic community. While plagiarism sometimes does occur intentionally, it also occurs because the writer doesn’t understand or does not know how to avoid it. Please visit our online tutorial:  Plagiarism 101  for an entertaining and interesting look at why people plagiarize and strategies to avoid it.

Plagiarism occurs when you use someone else’s ideas and PRETEND they are your own. Avoiding plagiarism doesn’t mean that you can never use other people’s ideas. It’s a widely known secret that in fact you CAN use other peoples’ ideas and even their words. For many research papers you NEED to do this in order to prove your own points. So use their ideas! Use their words! Professors expect to see in your writing that you’ve done your research and understand what the experts think when you formed your own opinions. The trick is to acknowledge who these expert ideas really belong to by CITING them!

So let’s assume you don’t want to plagiarize, you’ve given yourself enough time to do it right, but you’re still not sure about “putting things in your own words,” judging when to cite work, or how to cite it. Read on for more information and examples.

Why acknowledge sources?

Doing research for a paper is an exploration and learning process. By acknowledging our sources we show our reader the path we took to come to our conclusions. Citing the authors we read shows how we tied others’ research and ideas together and how we came to learn about and develop our own ideas and opinions.

Why should you cite your sources?

1. Citations reflect the careful and thorough work you have put into locating and exploring your sources.

2. Citations help readers understand the context of your argument and are a courtesy to the reader, who may share your interest in a particular area of study.

3. Citations allow you to acknowledge those authors who contributed to your learning and your work.

4. Citations, by illustrating your own learning process, also draw attention to the originality and legitimacy of your own ideas.

5. By citing sources you demonstrate your integrity and skill as a responsible student and participant in your field of study.  [2]

When to cite sources

While professors and scholars may have specific requirements based on the needs of their discipline, there are cases where you should  always  cite your sources.

1. Direct quotes of more than one word.  If the author’s words are powerful or you need to be specific for your argument, the authors’ words can be used as a direct quote.

2. Paraphrasing or summarizing.  If you want to use someone else’s idea to help you make your point or to support your own ideas, in this case you would “translate” the ideas into your own words.

3. Information which may be common knowledge  but still unfamiliar to your reader. This would also include statistical information which may be familiar information but still requires confirmation.

4. Not just books or articles  should be cited. Any source that you use for information can and should be cited including interviews, websites, TV programs, etc.

5. Whenever you are not sure  if something should be cited, err on the side of caution and cite sources.

Let’s look at some examples…

Direct quotes

How much you quote will determine how it appears in the body of your paper but whether it is one word or an entire paragraph, direct quotes need to be cited.

Lappe’s explanation of a "thin democracy"  [3]  addresses a number of basic flaws within our American society.

Global warming is being recognized as a major issue throughout the world and as Al Gore instructs, "it is time to make peace with our planet."  [4]

Paraphrasing or Summarizing

This involves translating what you have read (or heard) and putting it into your own words. Paraphrasing typically refers to putting an idea or passage into your own words. Summarizing involves capturing the main idea or reducing a detailed piece to a shorter and more general synopsis.

Here's an example:

"Instructors usually allow students to find their own topics for a major writing assignment; thus choose something of interest to you so you won’t get bored after a few days. At the same time, your chosen topic will need a scholarly perspective." [5]

Paraphrase : When students are permitted to select their own topic to write about they should choose one that is interesting to them. The topic should also be scholarly in nature so that students will be able to find appropriate research and resources on the topic.  [5]

Summary : Students should select writing topics that are interesting and also lend themselves to academic research.  [5]

A summary generally addresses the overall theme of a passage, article, opinion, etc. while a paraphrase generally restates a more specific thought or idea. The difference between summarizing and paraphrasing is sometimes obvious and sometimes subtle — do you see the difference?

Common Knowledge? Or Not?

Some basic facts are common knowledge and easily confirmed from a variety of sources. Statistics should always be cited, as well as opinions and less familiar facts. Information that is considered well-known within your field of study will also help determine if it is considered common or not. However, if you are not sure, cite it!

The University at Albany located in Albany, New York and is part of the State University of New York.

This is common knowledge and easily confirmed in a multitude of sources.

The State University of New York was officially established in February of 1948 and currently consists of 64 institutions. The University at Albany is one of ten University Centers that are part of the SUNY system.  [6]

While the SUNY system is well known and these facts are easily confirmed, specific historical information or statistics should be cited.

How to cite?

We’ve talked about plagiarism as well as why and when to cite. The next question is "How?"

There are  two things you need to know  from your professor.

The FIRST is how you will reference your sources within your paper. Generally you will use one of the following options:

  • IN TEXT  citation is when your source author is included within the body of your paper. This acts as a reference to your 'Works Cited' page.
  • END NOTES  format is used in this document. The cited idea or quote is noted with a number and the source is listed at the end of the paper.
  • FOOT NOTES  format is similar to end notes however the citations are listed at the bottom of each page.

The SECOND thing you need to know is what Format and Style Guide to use. There are very specific rules about how to do this that are not included in this document. Your professor will tell you which s/he wants you to follow. The choices will typically be one of the following:

  • MLA  Format and Style Guide (Modern Language Association)
  • APA  Format and Style Guide (American Psychological Association)
  • CHICAGO  Manual of Style

Please visit the University Libraries' Citation Basics research guide  for information and instructions on these style guides. Once you know what your professor wants you will need to follow the rules of that format accordingly.

[ 1 ]  "Plagiarism."  WordNet 3.0 . Princeton University. 03 Apr. 2008.  Dictionary.com http://dictionary.reference.com/browse/plagiarism .

[ 2 ] Adapted from "Sources and Citation at Dartmouth College." Dartmouth College. 1998. Retrieved 9 Feb 2009.  http://www.dartmouth.edu/~writing/sources/sources-citation.html

[ 3 ] Lappe, Frances Moore.  Getting a Grip.  Cambridge, MA : Small Planet Media, 2007.

[ 4 ] Gore, Al. "Nobel Prize Acceptance Speech."  Al’s Journal . December 10, 2007. Retrieved April 10, 2008  http://blog.algore.com/2007/12/nobel_prize_acceptance_speech.html

[ 5 ] Lester, James D. & James D. Lester Jr.  Writing Research Papers: A Complete Guide, 11th Ed.  New York: Pearson Education, 2005.

[ 6 ] "Short History of SUNY." The State University of New York. 2008. Retrieved April 25, 2008.  http://www.suny.edu/student/university_suny_history.cfm

Still Have Questions?

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Citation Help

  • About Citing and Citation Styles

MLA Style Online Resources

Mla style books.

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MLA (Modern Language Association) Style is most commonly used for papers in the liberal arts and humanities.

QUICK LINKS:  *Links to Purdue OWL MLA 9th Edition*

MLA General Format

In-text Citations

Footnotes & Endnotes

Works Cited Page

Sample Works Cited Page

Sample Paper

QUICK GUIDE:

Fresno State library MLA Citation Guide (4-page pdf)   *MLA 8th Edition - update pending*

F resno State Library’s MLA Quick Guide is based on the 8th edition. *Only use it if your instructor has specified MLA 8th edition.* The handout is being updated, and you can get the updated information in the print handbook or on the Purdue OWL web site.  TUTORIALS:

MLA Style Essay Format (walks you through the basics of setting up your paper in Word)

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In-text citations

In-text citation examples, personal communications.

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A parenthetical citation includes the last name(s) of the author(s) followed by a comma and the page number(s). The parenthetical citation can be at the end of a sentence or may be in the middle of a sentence if needed to be clear on what is being cited.

A company should always do what is right regardless of the consequences, but doing the right thing tends to result in the best outcomes (Dunn, 2016).

Because doing the right thing is always the best choice (Dunn, 2016), corporate leaders must carefully develop a strong ethical compass.

A narrative citation is used when the author’s name is part of the text. In these cases, the author’s name does not need to be repeated in the parenthetical reference.

Dunn (2016) asserts the view that though a company should do what is right regardless of the potential consequences, ethical actions often produce the best possible outcomes for all (p. 22).

For more on in-text citations of a paraphrase, see opens new window https://apastyle.apa.org/style-grammar-guidelines/citations/paraphrasing

When quoting a source directly, page numbers are used to indicate the location of the quoted text. Though page numbers are not required for a paraphrase, it may be helpful to include page numbers to indicate the location of the paraphrased text. If the source has no page numbers, other location indicators, such as paragraph or section numbers may be used.

“Fundraising is an art and a science” (Garry, 2017, p. 99).

It is hard to predict how donors will respond to an appeal, but in time fundraisers learn to trust their intuition regarding the best approach (Garry, 2017, p. 99).

For more on citing quotations, See opens new window https://apastyle.apa.org/style-grammar-guidelines/citations/quotations

Personal communications are sources that can not be recovered or accessed by the reader because they are not published. This includes emails, texts, conversations (in person, by phone or video conference, etc.), online chats, interviews, classroom lectures, memos, letters, etc. If the information is not available from any recoverable (published) source, it can be cited as a personal communication. Because the reader can not access the information in personal communications, they will not be included in the reference list, but cited in the text only.

In an interview, Benjamin Colby (personal communication, July 25, 2015) mentioned . . . .

A. J. Montoya (personal communication, February 4, 2020) emailed detailed financials to the research team . . . .

In a lecture on November 1, 2021, to a BUS 326 class, Dr. Dash said . . . .

More information is available on the APA Style website .

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cite your source in research paper

Citation and the lack thereof, plagiarism is the academic version of copyright. Plagiarism occurs when you borrow another's words (or ideas) and do not acknowledge that you have done so. In this culture, we consider our words and ideas intellectual property; like a car or any other possession, we believe our words belong to us and cannot be used without our permission. The best way to avoid plagiarism is to cite your sources - both within the body of your paper and in a bibliography of sources you used at the end of your paper.

You must cite:

  • Facts, figures, ideas, or other information that is not common knowledge
  • Ideas, words, theories, or exact language that another person used in other publications
  • Publications that must be cited include:  books, book chapters, articles, web pages, theses, etc.
  • Another person's exact words should be quoted and cited to show proper credit 

When in doubt, be safe and cite your source!

About ASCE Style

cite your source in research paper

  • ASCE Citation Style Sheet All factual material that did not originate with the authors should be accompanied by a citation to its reference. ASCE Books prefer the author-date system of referencing. This system has two parts, the text citation and the References list.

Tips for Citing Your Sources in ASCE Style

Some tips for citing your sources in ASCE style include:

  • If the source is a journal article, use the page numbers or DOI instead.
  • These extra parts come directly after the .com, .edu, or .gov in a website address.   
  • For example, use https://infoweb.newsbank.com not https://infoweb.newsbank.com/apps/news/documentview?p=AQM .
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Citing your sources.

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Guides to Citing Sources

Apa (american psychological association) style, chicago style, harvard style, mla (modern language association) style, nlm (national library of medicine style).

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Proper citation is an essential aspect of scholarship. Citing properly allows your reader or audience to locate the materials you have used. Most importantly, citations give credit to the authors of quoted or consulted information. Failure to acknowledge sources of information properly may constitute plagiarism.  For an explicit definition of plagiarism, see the  Boston University Academic Conduct Code .

For detailed instructions on how to cite within the text of your paper, please consult a style manual listed below. Please also note: some of the resources below do not cover every possibility you might encounter when trying to cite your sources. For this reason, it is suggested that you consult a style manual to create your bibliography.

Finally, please also see our separate citation guides  for Business students  or  for Science students .

cite your source in research paper

There is no official guide to Harvard Style. If you Google “Harvard Style Guide” you will find many websites that list examples. One of the best guides is from  Monash University . Look to the bottom of the page to get examples.

cite your source in research paper

Citing Medicine: the NLM style guide for authors, editors, and publishers

The official style manual for the National Library of Medicine (NLM), and suggested when citing documents from the associated databases MedLine and PubMed. The online edition supercedes the print edition as the most up to date.

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  6. REFERENCING AND PLAGIARISM

COMMENTS

  1. How to Cite Sources

    The free Scribbr Citation Generator is the quickest way to cite sources in these styles. Simply enter the URL, DOI, or title, and we'll generate an accurate, correctly formatted citation. Generate accurate citations with Scribbr Instantly correct all language mistakes in your text Upload your document to correct all your mistakes in minutes

  2. Free Citation Generator

    Knowledge Base Scribbr Citation Generator Accurate APA, MLA, Chicago, and Harvard citations, verified by experts, trusted by millions Cite a webpage, book, article, and more Citation style APA 7th edition Cite Cite with Chrome New Cite manually Scribbr for Chrome: Your shortcut to citations

  3. How to Cite Sources

    Here is a complete list for how to cite sources. Most of these guides present citation guidance and examples in MLA, APA, and Chicago. If you're looking for general information on MLA or APA citations, the EasyBib Writing Center was designed for you!

  4. Overview

    It's important to cite sources you used in your research for several reasons: To show your reader you've done proper research by listing sources you used to get your information To be a responsible scholar by giving credit to other researchers and acknowledging their ideas To avoid plagiarism by quoting words and ideas used by other authors

  5. Library Guides: Start Your Research: Cite Your Sources

    Cite Your Sources - Start Your Research - Library Guides at University of California, Santa Cruz Start Your Research Why Cite? Besides avoiding plagiarism, citing: is the right thing to do to give credit to those who had the idea shows that you have read and understand what experts have had to say about your topic

  6. In-Text Citations: The Basics

    APA Citation Basics. When using APA format, follow the author-date method of in-text citation. This means that the author's last name and the year of publication for the source should appear in the text, like, for example, (Jones, 1998). One complete reference for each source should appear in the reference list at the end of the paper.

  7. How to Cite Sources in APA Citation Format

    3. How to Cite Different Source Types. In-text citation doesn't vary depending on source type, unless the author is unknown. Reference list citations are highly variable depending on the source. How to Cite a Book (Title, not chapter) in APA Format. Book referencing is the most basic style; it matches the template above, minus the URL section.

  8. Format Your Paper & Cite Your Sources

    Placement: The reference list appears at the end of the paper, on its own page(s). If your research paper ends on page 8, your References begin on page 9. Heading: Place the section label References in bold at the top of the page, centered. Arrangement: Alphabetize entries by author's last name. If source has no named author, alphabetize by the ...

  9. Research and Citation Resources

    Cite your source automatically in MLA or APA format Cite Using citation machines responsibly Powered by APA Style (7th Edition) These OWL resources will help you learn how to use the American Psychological Association (APA) citation and format style.

  10. 11. Citing Sources

    11. Citing Sources Organizing Your Social Sciences Research Paper Offers detailed guidance on how to develop, organize, and write a college-level research paper in the social and behavioral sciences. Definition

  11. A Quick Guide to Referencing

    A Quick Guide to Referencing | Cite Your Sources Correctly Referencing means acknowledging the sources you have used in your writing. Including references helps you support your claims and ensures that you avoid plagiarism. There are many referencing styles, but they usually consist of two things:

  12. Citing Sources: What are citations and why should I use them?

    Whenever you use sources such as books, journals or websites in your research, you must give credit to the original author by citing the source. Why do researchers cite? Scholarship is a conversation and scholars use citations not only to give credit to original creators and thinkers, but also to add strength and authority to their own work.

  13. Citing Sources

    Cite all outside sources you use in your research paper! Citing is required for sources you: Quote word-for-word, Paraphrase (rewrite using your own words), and Summarize (rewrite the main concept or idea in your own words). Keep Track of Information About Your Sources

  14. APA: Citing Within Your Paper

    An in-text citation is a citation within your writing that shows where you found your information, facts, quotes, and research. All APA in-text citations require the same basic information: Author's last name (no first names or initials) Year of publication (or "n.d." if there is "no date": (LastName, n.d., p.#))

  15. Introduction

    A citation is the way you tell your readers that certain material in your work came from another source and gives your readers the information necessary to find that source again. Citations may include: Information about the Author(s) or Editor(s) The title of the work; The publisher; The date published; The page numbers of the material you are ...

  16. MLA In-Text Citations: The Basics

    MLA (Modern Language Association) style is most commonly used to write papers and cite sources within the liberal arts and humanities. This resource, updated to reflect the MLA Handbook (9 th ed.), offers examples for the general format of MLA research papers, in-text citations, endnotes/footnotes, and the Works Cited page.

  17. EasyBib®: Free Bibliography Generator

    This is the total package when it comes to MLA format. Our easy to read guides come complete with examples and step-by-step instructions to format your full and in-text citations, paper, and works cited in MLA style. There's even information on annotated bibliographies.

  18. APA 7th

    APA General Format The guidelines for paper format apply to both student assignments and manuscripts being submitted for publication to a journal. If you are using APA Style to create another kind of work (e.g., a website, conference poster, or PowerPoint presentation), you may need to format your work differently in order to optimize its presentation, for example, by using different line ...

  19. Citation Examples

    To cite a source in these styles, you need a brief in-text citation and a full reference. Use the interactive tool to understand how a citation is structured and see examples for common source types.

  20. When and Why to Cite Sources

    Why should you cite your sources? 1. Citations reflect the careful and thorough work you have put into locating and exploring your sources. 2. Citations help readers understand the context of your argument and are a courtesy to the reader, who may share your interest in a particular area of study. 3.

  21. How To Cite a Research Paper in 2024: Citation Styles Guide

    If you are looking for the best advice on how to write a research paper, the first thing you would find is to cite your sources. In academic research, it is standardized by many institutions. And, publication venues such as conferences and journals are somehow strict about their formats.

  22. MLA

    MLA (Modern Language Association) Style is most commonly used for papers in the liberal arts and humanities. QUICK LINKS: *Links to Purdue OWL MLA 9th Edition* MLA General Format. In-text Citations. Footnotes & Endnotes. Works Cited Page . Sample Works Cited Page. Sample Paper. QUICK GUIDE:

  23. Citing Sources with APA 7th Edition: In-text citations

    From the APA Style web site: APA Style uses the author-date citation system, in which a brief in-text citation directs readers to a full reference list entry. The in-text citation appears within the body of the paper (or in a table, figure, footnote, or appendix) and briefly identifies the cited work by its author and date of publication.

  24. Citing Sources

    Give credit to the authors of the sources you used. Provide evidence you did research -- good, credible sources give your work more authority. Allows your reader to locate the sources you used. Avoid plagiarism. When to Cite: You should cite a source if you reproduce, quote, paraphrase, or summarize ideas and/or media created by other individuals.

  25. Citing Your Sources

    Proper citation is an essential aspect of scholarship. Citing properly allows your reader or audience to locate the materials you have used. Most importantly, citations give credit to the authors of quoted or consulted information. For detailed instructions on how to cite within the text of your paper, please consult a style manual listed below.

  26. Citing Your Sources

    Failure to acknowledge sources of information properly may constitute plagiarism. For an explicit definition of plagiarism, see the Boston University Academic Conduct Code. For detailed instructions on how to cite within the text of your paper, please consult a style manual listed below.

  27. Cite Your Sources ASCE Style

    Some tips for citing your sources in ASCE style include: Do not include "EBSCO host," "vmiexproxy," or web addresses that contain "research.ebsco.com" in your citations. If the source is a journal article, use the page numbers or DOI instead. When citing a website, trim off the extra parts of the website address.

  28. Research: WR151: Gothic Tales of Gender & Sexuality: Citing Your Sources

    Failure to acknowledge sources of information properly may constitute plagiarism. For an explicit definition of plagiarism, see the Boston University Academic Conduct Code. For detailed instructions on how to cite within the text of your paper, please consult a style manual listed below.