Bibliography vs Works Cited vs References: What’s the Difference?

You’ve finished your essay. You’ve done the research. Now you need to list your sources at the end — but should you call it a Bibliography, a Works Cited page, or a Reference List? These terms are not interchangeable, and using the wrong one can signal to your professor that you don’t fully understand the citation style you’re supposed to be using.

Here’s a clear breakdown of what each one means and when to use it.

Quick Definitions

Reference List

A reference list includes only the sources you cited in your essay. Every in-text citation has a matching entry, and every entry has a matching in-text citation. Nothing extra.

Used by: APA, Harvard

Works Cited

A Works Cited page also includes only the sources you cited in your essay. It functions the same way as a reference list — it’s just the term that MLA uses.

Used by: MLA

Bibliography

A bibliography can include all sources you consulted during your research, even if you didn’t directly cite them in the text. It’s a broader list that shows the full scope of your reading.

Used by: Chicago (Notes-Bibliography system), and sometimes requested as an additional element alongside a reference list in other styles.

The Key Distinction

The fundamental difference is scope:

• Reference List / Works Cited = only what you cited
• Bibliography = everything you read, whether you cited it or not

In practice, though, things get muddier. Many professors use “bibliography” as a casual synonym for any source list, even when they technically mean a reference list. And some assignment briefs ask for a “bibliography” when they actually want an APA reference list. This is where confusion starts.

Which Styles Use Which Term?

Citation Style	What to Call Your Source List	What It Includes
APA 7th Edition	Reference List	Only cited sources
Harvard	Reference List	Only cited sources
MLA 9th Edition	Works Cited	Only cited sources
Chicago (Notes-Bibliography)	Bibliography	Can include uncited sources
Chicago (Author-Date)	Reference List	Only cited sources

Notice that Chicago uses different terms depending on which of its two systems you’re using. Notes-Bibliography gets a “Bibliography.” Author-Date gets a “Reference List.”

What About an Annotated Bibliography?

An annotated bibliography is a different assignment altogether. It’s a list of sources where each entry is followed by a short paragraph (the “annotation”) summarising and evaluating the source. Annotated bibliographies are often assigned as standalone tasks, separate from essays.

If your professor asks for an annotated bibliography, they want:

1. A full citation for each source (in whatever style they specify)
2. A 100-200 word annotation below each citation, covering what the source says, how credible it is, and how it’s relevant to your topic

This is not the same as the source list at the end of an essay.

Common Confusing Scenarios

“My professor said ‘bibliography’ but the style guide says ‘reference list’“

This happens all the time. If your professor says “include a bibliography” but you’re using APA, they almost certainly mean a reference list — they’re just using the word loosely. Follow the APA formatting rules and title it “References.” If you’re unsure, ask.

“My professor wants a bibliography AND a reference list”

Some assignments, particularly dissertations and theses, ask for both. In this case:

• The reference list includes only the sources you cited
• The bibliography (sometimes called “Further Reading”) includes additional sources you consulted but didn’t cite

This is less common at undergraduate level but does happen.

“My professor says ‘Works Cited’ but I’m using APA”

They probably mean your reference list. “Works Cited” is technically an MLA term, but some professors use it generically. Use the correct heading for your citation style — “References” for APA, “Works Cited” for MLA.

“Can I include sources I read but didn’t cite?”

• APA/Harvard: No. Your reference list should only contain sources that appear in your in-text citations.
• MLA: No. Your Works Cited page should match your in-text citations exactly.
• Chicago NB: Yes. Your bibliography can include sources you consulted but didn’t cite in a footnote.
• If your professor specifically asks for it: Yes, regardless of style. The professor’s instructions override the style guide.

Formatting Differences

The actual formatting of entries is determined by your citation style, not by whether you call the list a bibliography, reference list, or Works Cited. A book entry in an APA reference list follows APA formatting rules. A book entry in a Chicago bibliography follows Chicago rules.

However, the heading at the top of the page should match your style:

• APA: “References” (centred, bold)
• Harvard: “Reference List” or “References” (check your university’s guide)
• MLA: “Works Cited” (centred, not bold)
• Chicago NB: “Bibliography” (centred)
• Chicago AD: “References” (centred)

All styles use hanging indents (first line flush left, subsequent lines indented) and alphabetical ordering by the author’s surname.

How to Tell What Your Professor Wants

1. Read the assignment brief carefully. Look for the specific term they use — bibliography, reference list, or Works Cited.
2. Check which citation style is required. If they say “use APA” and mention a “bibliography,” they almost certainly mean a reference list formatted in APA.
3. Look at the rubric. Some rubrics specify exactly how the source list will be assessed.
4. Check your university library website. Most libraries publish referencing guides that clarify which term and format to use for each style.
5. Ask. If you’re genuinely unsure, a quick email to your professor will save you marks. “Should my source list include only cited sources, or also sources I consulted?” is a perfectly reasonable question.

Don’t Lose Marks on Terminology

The difference between a bibliography, Works Cited page, and reference list is simple once you understand it — but using the wrong one can cost you marks for formatting. Worse, having a mismatch between your in-text citations and your source list (entries with no matching citation, or citations with no matching entry) is a red flag that professors check for.

RefFinder automatically generates your source list with the correct heading, formatting, and structure for your chosen citation style. Paste your essay, select your style, and get a properly titled, correctly formatted reference list, Works Cited page, or bibliography — no second-guessing required.

Try RefFinder free and make sure your source list matches your style guide.