A Student’s Guide: How to Cite an Encyclopedia

Citing an encyclopedia or dictionary for a college or university assignment can feel tricky. It’s not quite a book, not always a standard website. But you must cite it. Giving credit is how we show where our ideas come from and allows your reader to find the reference source themselves. Many students feel a quick sting of confusion when they first try to cite an encyclopedia or dictionary, largely because the rules seem slightly different from citing a standard book or website article. You might have an encyclopedia entry with no author, or one from a huge library database, or a dusty print volume number from your school library. Don’t worry. This guide breaks down how to cite an encyclopedia step-by-step for the most common styles.

Why Are Encyclopedias and Dictionaries Cited Differently?

Before we jump into formats, let’s understand the “why.” Why does an encyclopedia entry get special treatment? It’s because encyclopedias and dictionaries are “reference works.” They are structured differently from a novel or a research paper. A dictionary or encyclopedia entry is a small piece inside a much larger collection. Sometimes an author is listed for the entry, but often the publisher name (like the “Editors of Britannica”) takes responsibility for the whole volume. The citation machinery is built to handle this. You’re not citing the entire World Book Encyclopedia; you’re citing one specific encyclopedia entry within it, like the example king article.

Think of it this way: citing the whole encyclopedia is like saying you watched “Netflix” for your research. Citing the encyclopedia entry is like saying you watched “Stranger Things, Season 4, Episode 8.” It’s specific, accurate, and lets your teacher know exactly what you used.

The Two-Part Citation System

Every citation style (MLA, APA, and Chicago) uses a two-part system. You need both for your university assignment.

1. The Reference List (or Works Cited) Entry: This is the full citation. It goes at the end of your paper in a list. It gives your reader all the details they need to find the exact dictionary or encyclopedia entry you used.
2. The In-Text Citation: This is the short note inside your paragraph. It’s a bibliographic breadcrumb that points your reader to the full entry in your reference list. It usually just includes the author’s last name and, for MLA, the page numbers (if available). For APA, it’s the author’s last name and the year.

Let’s build these citations for the most common styles.

How to Cite an Encyclopedia in MLA Style (9th ed.)

MLA (Modern Language Association) style is most common in the humanities (like English, History, and Art). It focuses on the author and the title of the entry. One key feature: the title of the entry is always placed in quotation marks.

Print Encyclopedia (Known Author)

This is common in multi-volume sets like the World Book Encyclopedia. I remember being stumped by an old print encyclopedia set in my middle school library. The sheer smell of the dusty paper and ink was overwhelming, and finding the publisher’s name felt like a treasure hunt.

Look for the author’s name, often listed as initials at the end of the encyclopedia entry, which you then match to a list of contributors, sometimes found at the beginning of the first edition or volume.

Works Cited Format:

“Author’s Last Name, First Name. “Title of Entry.” Title of Encyclopedia, edited by Editor’s Name, Edition, vol. Volume Number, Publisher, Year, pp. Page Numbers.“

Works Cited Example:

“King, Pauline N., and Lee Wester. “Hawaii.” The World Book Encyclopedia, vol. 9, World Book, 1998, pp. 88-110.“

In Text Citation Example:

The geography of the islands is volcanic, which contributes to their unique ecosystems (King and Wester 90).

Print Encyclopedia (Unknown Author)

If an encyclopedia or dictionary entry lists no author, your citation simply starts with the title of the entry.

Works Cited Format:

““Title of Entry.” Title of Encyclopedia, Edition, Publisher, Year, p. Page Number.“

Works Cited Example (for a dictionary entry):

““Anchor.” Merriam-Webster’s Collegiate Dictionary, 11th ed., Merriam-Webster, 2020, p. 46.“

In Text Citation Example:

An anchor can be both a physical object and a “source of stability” (“Anchor” 46).

Your in-text citation must match the first word of your Works Cited entry. Since this one starts with “Anchor,” the in-text citation uses (“Anchor”). You must include the page numbers if they are visible page numbers.

Online Encyclopedia (from a Website)

This is for encyclopedias and dictionaries you access directly on the web, like Encyclopedia Britannica or The Canadian Encyclopedia.

Works Cited Format (Known Author):

“Author’s Last Name, First Name. “Title of Entry.” Title of Encyclopedia, Publisher, Publication Date, URL. Accessed Date (optional but recommended).“

Works Cited Example:

“Beckwith, John, and Donovan Foley. “Music Composition.” The Canadian Encyclopedia, Historica Canada, 18 Feb. 2012, www.thecanadianencyclopedia.ca/en/article/music-composition. Accessed 20 Oct. 2025.“

In Text Citation Example:

Early Canadian music composition was heavily influenced by European traditions (Beckwith and Foley).

There are no page numbers for this online encyclopedia entry, so the in-text citation includes only the authors’ names. Do not invent page numbers or use paragraph numbers unless your instructor specifies.

Works Cited Format (Unknown Author):

““Title of Entry.” Title of Encyclopedia, Publisher, Publication Date, URL. Accessed Date.“

Works Cited Example:

““Syllogism.” Encyclopaedia Britannica, Encyclopaedia Britannica, Inc., 19 Sep. 2024, www.britannica.com/topic/syllogism. Accessed 21 Oct. 2025.“

In Text Citation Example:

A classic syllogism has a major premise, a minor premise, and a conclusion (“Syllogism”).

Online Encyclopedia (from a Library Database)

This is when you use your school’s library database (like Gale, EBSCO, or ProQuest) to find an encyclopedia entry. The format is similar to a web source, but you end with the database name and a DOI or stable URL.

Works Cited Format:

“Author’s Last Name, First Name. “Title of Entry.” Title of Encyclopedia, edited by Editor’s Name, Edition, Publisher, Date, Name of Database, DOI or URL.“

Works Cited Example:

““Conk.” Oxford English Dictionary, Oxford University Press, June 2024. Oxford English Dictionary, https://doi.org/10.1093/OED/8724964099.“

In Text Citation Example:

The term “conk” as a hairstyle originated in the 1920s (“Conk”).

This is a dictionary entry where the entry has no author, so the in-text citation uses the title of the entry.

Special Case: Wikipedia

A Wikipedia article is a type of online encyclopedia. But it’s a free encyclopedia that can be edited by anyone, so you must evaluate the content carefully. Many instructors will not consider it an acceptable source for a college or university assignment. Always check. If you are allowed to use it, here is how you cite it.

Works Cited Format:

““Title of Entry.” Wikipedia: The Free Encyclopedia, Wikimedia Foundation, Date Entry Last Modified, Time, URL of permanent link. Accessed Date.“

You can find the “Date Entry Last Modified” and “Time” at the bottom of the Wikipedia article. The permanent link is found by clicking “Page information” in the sidebar, then finding the “Permanent link” URL.

Works Cited Example:

““Anthropocene.” Wikipedia: The Free Encyclopedia, Wikimedia Foundation, 24 June 2024, 3:34 pm, en.wikipedia.org/w/index.php?title=Anthropocene&oldid=1230764027. Accessed 18 July 2025.“

In Text Citation Example:

The “Anthropocene” is a proposed geological epoch defined by human impact (“Anthropocene”).

How to Cite an Encyclopedia in APA Style (7th ed.)

APA (American Psychological Association) style is common in the social sciences (like Psychology, Sociology, and Education). It puts a strong emphasis on the date of publication. In APA, you only capitalize the first letter of the title of the entry (and any proper nouns). The title of the entry is not put in quotation marks.

Print Encyclopedia (Known Author)

Just like the MLA example king from World Book, but formatted for APA.

Reference List Format:

“Author’s Last Name, First Initial. Second Initial. (Year). Title of entry. In Editor’s Initial. Last Name (Ed.), Title of encyclopedia (Vol. Volume Number, pp. Page Numbers). Publisher Name.“

Notice the second initial is used if provided. The title of the encyclopedia is italicized, but the title of the entry is not.

Reference List Example:

“King, P. N., & Wester, L. (1998). Hawaii. In The World Book Encyclopedia (Vol. 9, pp. 88-110). World Book.“

In Text Citation Example:

The geography of the islands is volcanic, which contributes to their unique ecosystems (King & Wester, 1998).

If quoting directly:

This is clear as “the highest peak…is Mauna Kea” (King & Wester, 1998, p. 90).

Print Encyclopedia (Unknown Author)

When the entry has no author, the title of the entry moves to the author position.

Reference List Format:

“Title of entry. (Year). In Editor’s Initial. Last Name (Ed.), Title of encyclopedia (Vol. Volume Number, pp. Page Numbers). Publisher Name.“

Reference List Example:

“Crop circles. (2007). In Chambers’ Dictionary of the Unexplained (p. 27). Chambers.“

In Text Citation Example:

The phenomenon was first widely reported in the 1970s (“Crop Circles,” 2007).

For an in-text citation with an unknown author title, APA uses quotation marks around the title of the entry and a capital letter for each word in the title. This is a rare case where APA uses title case and quotation marks in the in-text citation, but not in the reference list entry.

Online Encyclopedia (from a Website)

For a standalone online encyclopedia, the format is streamlined. You don’t need the publisher name if it’s the same as the site name.

Reference List Format (Known Author):

“Author’s Last Name, F. I. (Year, Month Day). Title of entry. In the Title of the Encyclopedia. Retrieved Month Day, Year, from URL“

Reference List Example:

“Beckwith, J., & Foley, D. (2012, February 18). Music composition. In The Canadian Encyclopedia. Retrieved October 20, 2025, from https://www.thecanadianencyclopedia.ca/en/article/music-composition“

In Text Citation Example:

Early Canadian music composition was heavily influenced by European traditions (Beckwith & Foley, 2012).

Reference List Format (Unknown Author):

“Title of entry. (Year, Month Day). In the Title of the Dictionary. Retrieved Month Day, Year, from URL“

Reference List Example:

“Acetone. (2012). In Macmillan Dictionary. Retrieved October 21, 2025, from http://www.macmillandictionary.com/dictionary/british/acetone“

This is the URL example acetone. Notice the date is just (2012) as no specific month or day was given. The retrieval date is included because the content of an encyclopedia or dictionary can change.

In Text Citation Example:

The substance is a common solvent (“Acetone,” 2012).

Online Encyclopedia (from a Library Database)

When you find an encyclopedia or dictionary entry in a library database like AccessScience or Oxford Reference.

Reference List Format (Known Author):

“Author’s Last Name, F. I. (Year). Title of entry. In Editor’s F. I. Last Name (Ed.), Title of encyclopedia (Edition). Publisher Name. DOI or URL“

Reference List Example:

“Gannon, P. (n.d.). Brain evolution. In AccessScience McGraw-Hill encyclopedia of science & technology (10th ed.). McGraw-Hill. https://doi.org/10.1036/1097-8542.YB040925“

Use (n.d.) for “no date” if one isn’t provided. This entry for brain evolution is from the AccessScience McGraw-Hill encyclopedia.

In Text Citation Example:

The development of specific neural pathways is a key factor (Gannon, n.d.).

If quoting from a section with no visible page numbers:

This is seen in the “major reorganization of the hominid brain” (Gannon, n.d., Comparative Anatomy section, para. 1).

When page numbers are missing, the text citation should include the section heading and paragraph number to help your reader locate the quote.

Special Case: Wikipedia

APA requires you to cite the specific archived version of the Wikipedia article you read, as the content carefully changes over time. This permanent link is the one you get from the “Page information” tool.

Reference List Format:

“Title of entry. (Year, Month Day). In Wikipedia. URL of archived version“

Reference List Example:

“Veterinary medicine. (2025, October 15). In Wikipedia. https://en.wikipedia.org/w/index.php?title=Veterinary_medicine&oldid=1230764099“

In Text Citation Example:

The field covers all aspects of animal health (“Veterinary Medicine,” 2025).

A Quick Look at Chicago Style (Notes-Bibliography)

Chicago style, often used in history, has a different system. It uses footnotes or endnotes for the in-text citation. For well-known encyclopedias and dictionaries, the Chicago style often only requires a note, not a bibliography entry. The note often uses “s.v.” which stands for sub verbo, or “under the word.”

As the Chicago Manual of Style Q&A explains, online reference works are cited like print versions but with a URL and access date.

Footnote Format:

1. Title of Encyclopedia, edition (if any), s.v. “Title of Entry,” by Author’s Name (if any), accessed Date, URL (if online).

Footnote Example:

1. Encyclopaedia Britannica Online, s.v. “Sibelius, Jean,” accessed August 25, 2024, https://www.britannica.com/biography/Jean-Sibelius.

The in-text citation is just the superscript number.¹ Your paper would have a matching note at the bottom of the page.

Dictionaries vs. Encyclopedias: Is Citing Different?

No, not really. For citation purposes, a dictionary or encyclopedia entry is treated almost identically. A dictionary entry is just a specific type of encyclopedia entry. Both are reference works. Both often have an unknown author. Both are alphabetized by the title of the entry. You can follow the exact same formats. Whether you’re citing the Oxford Dictionary or Encyclopedia Britannica, the citation components are the same. A good guide to citing dictionaries or a dictionary’s MLA citation guide will confirm this, showing formats that mirror the ones above.

MLA vs. APA: Key Differences for Encyclopedia Citations

Element	MLA 9	APA 7
Title of Entry	In Quotation Marks, Title Case. (e.g., “Hawaii”)	No quotation marks, Sentence case. (e.g., Hawaii)
Author	Full First Name (e.g., King, Pauline N.)	First and Second Initial Only (e.g., King, P. N.)
Date	Goes near the end of the citation.	Goes right after the author, in parentheses (1998).
In Text Citation (Paraphrase)	(Author) or (“Title”)	(Author, Year) or (“Title,” Year)
In Text Citation (Quote)	(Author Page) or (“Title” Page)	(Author, Year, p. #) or (“Title,” Year, para. #)

Final Checklist and Tools

Citing an encyclopedia or dictionary becomes easy once you see the pattern. Before you submit your university assignment, run through this final check:

• Does my in-text citation match the very first word (or two or three words) of my reference list entry?
• Did I use quotation marks correctly for my style (MLA yes, APA no in the reference list)?
• Did I capitalize the title of the entry correctly (MLA title case, APA sentence case)?
• If I have no page numbers, did I format my in-text citation correctly for my style?
• Is my reference list double-spaced, with a hanging indent (where the first line is to the left and every subsequent line is indented)?

It can feel like a lot to remember. But mastering citations is a skill that will serve you well. If you’re feeling stuck, you can always use a citation generator to help you build the entry. Just be sure to double-check its output against the examples here. Sometimes the machines get the details wrong, especially with a dictionary or encyclopedia entry.