Reference List vs. Bibliography vs. Works Cited: Format and Order

Reviewed by Prof. Dr. Alexander Holtermann · Updated 16 October 2026 · 5 min read

A reference list contains every source cited in your text; a bibliography may include works you consulted. APA says “References”, MLA “Works Cited”.

Key takeaways

Reference list = only sources cited in the text (APA, Harvard, Chicago author-date); Works Cited = MLA; Bibliography = Chicago notes-bibliography or a list including consulted sources.
Every in-text citation must appear in the list, and every entry in the list must be cited in the text (except in a consulted bibliography, if your department asks for one).
Entries are alphabetical by the first author’s surname, with a hanging indent of 0.5 inch (1.27 cm).
Multiple works by the same author are ordered by year (oldest first) in APA and Harvard; MLA orders them alphabetically by title.
A reference manager prevents most errors, but you still need to check every entry: imported metadata is often incomplete or wrongly capitalized.

Reference list, bibliography, works cited: what is the difference?

The names are often used interchangeably in everyday speech, but in citation styles they mean different things. Using the wrong heading is a small but visible error.

One rule beats every guide on the internet, including this one: your own university’s or department’s style guide, handbook, or assignment brief always takes precedence. If it differs from what you read here, follow it. You can upload that handbook to Professor Digital, and everything (outline, citations, checks) is tailored to it.

Name	Style	Contains
References	APA 7, Chicago author-date	Only works cited in the text
Reference list	Harvard (UK)	Only works cited; some universities add a separate bibliography
Works Cited	MLA 9	Only works cited in the text
Bibliography	Chicago notes-bibliography	Cited works, may include relevant consulted works
Annotated bibliography	Assignment type	Entries plus a short summary or evaluation of each source

Alphabetical order: the rules

All major styles order entries alphabetically by the surname of the first author, but the details of tricky cases matter.

Letter by letter: “Brown, J.” comes before “Browning, A.” (nothing precedes something).
Same first author: single-author works first, then multi-author works ordered by the following authors’ surnames.
Same author(s), different years (APA, Harvard): oldest first: Kim (2019), Kim (2021).
Same author, same year (APA, Harvard): add a, b, c after the year and order by title: Kim (2020a), Kim (2020b).
Same author (MLA): order by title; replace the name with three hyphens after the first entry.
Group authors: alphabetize by the full name (“American Psychological Association”, not “APA”).
No author: move the title to the author position and alphabetize by its first significant word (ignore “A”, “An”, “The”).
Prefixes: follow the person’s own usage and your style guide (e.g., “de Gaulle” vs. “Van Gogh”).

Formatting the list

Formatting is similar across styles. Set the hanging indent with your word processor’s paragraph settings rather than with tabs or spaces, so it stays correct when you edit.

Feature	APA 7	MLA 9	Harvard (typical)	Chicago NB
Heading	References (bold, centered)	Works Cited (centered)	Reference list	Bibliography (centered)
Position	New page after text	New page	New page	New page
Spacing	Double	Double	Per university	Single within, blank between (or double)
Indent	0.5-inch hanging	0.5-inch hanging	Often none or hanging	Hanging
Year position	After author	Near the end	After author	Near the end

Example: the same three sources in APA 7

This example shows a short APA reference list with invented authors. Note the alphabetical order, the order by year for the same author, sentence case for titles, and the DOI format.

Working with a reference manager

A reference manager stores your sources, inserts citations into your document, and generates the list in any style. It saves hours and prevents mismatches between text and list. Set it up at the start of your project, not the week before submission.

Do not trust it blindly. Metadata imported from databases or web pages often contains errors: titles in ALL CAPS or title case where APA needs sentence case, missing issue numbers, wrong document types (a report imported as a web page), or duplicate entries. Check every entry once against the original source before you submit.

Choose the exact style version (e.g., APA 7th, not 6th; your university’s Harvard variant).
Import via DOI or ISBN where possible: more reliable than web page capture.
Fix capitalization and author names in the library, not in the document, so the fix sticks.
Back up your library.

Final check before submission

Compare your text and your list systematically. A useful method: search your document for every opening parenthesis or footnote number and tick off each source in the list.

Every cited source appears in the list, spelled identically (names and years).
No source in the list that is not cited (unless your department wants a bibliography of consulted works).
Correct heading for your style.
Alphabetical order, correct order for same-author works.
Consistent formatting: italics, capitalization, punctuation, DOIs or URLs.
Hanging indent and spacing as required.

Frequently asked questions

What is the difference between a reference list and a bibliography?

A reference list contains only the sources you cited in your text. A bibliography can also include sources you consulted but did not cite, and is the term used in Chicago notes-bibliography style.

How do you order a reference list?

Alphabetically by the first author’s surname. For the same author, order by year (APA, Harvard) or by title (MLA).

Does the reference list count toward the word count?

At most universities, no. Some departments count it, so check your handbook or assignment brief.

What is a hanging indent?

A format where the first line of each entry starts at the margin and the following lines are indented, usually by 0.5 inch (1.27 cm). It makes authors easy to scan.

Should I include sources I read but did not cite?

Not in an APA, MLA, or Harvard reference list. Some UK departments ask for a separate bibliography of consulted works; follow your guide.

Can Zotero, EndNote or Mendeley create my reference list automatically?

Yes. Their word processor plugins insert in-text citations and build the reference list in the chosen style. Check the imported data (authors, capitalisation, DOI), because the list is only as good as your library.

Sources and further reading

American Psychological Association. (2020). Publication Manual of the American Psychological Association (7th ed.). American Psychological Association.
Modern Language Association of America. (2021). MLA Handbook (9th ed.). Modern Language Association of America.
University of Chicago Press. (2024). The Chicago Manual of Style (18th ed.). University of Chicago Press.
Pears, R., & Shields, G. (2022). Cite Them Right: The Essential Referencing Guide (12th ed.). Bloomsbury Academic.

Your university’s examination regulations and style guide always take precedence.