Creating a Chicago Style Bibliography | Format & Examples

A Chicago style bibliography lists the sources cited in your text. Each bibliography entry begins with the author’s name and the title of the source, followed by relevant publication details. The bibliography is alphabetized by authors’ last names.

A bibliography is not mandatory, but is strongly recommended for all but very short papers. It gives your reader an overview of all your sources in one place. Check with your instructor if you’re not sure whether you need a bibliography.

Always make sure to pay attention to punctuation (e.g., commas, quotation marks, parentheses) in your citations.

Chicago Reference Generator

Chicago style bibliography examples

Bibliography entries vary in format depending on the type of source. Templates and examples for the most common source types are shown below.

Formatting the bibliography page

The bibliography appears at the end of your text. The heading Bibliography is bolded and centred at the top of the page.

Unlike the rest of a Chicago format paper, the bibliography is not double-spaced. However, add a single line space between entries.

If a bibliography entry extends onto more than one line, subsequent lines should be indented (hanging indent), as seen in the example below. This helps the reader to see at a glance where each new entry begins.

There are further guidelines for formatting a Chicago style annotated bibliography, in which you write a paragraph of summary and source evaluation under each source.

Author names in the bibliography

Author names in the bibliography are inverted: The last name comes first, then the first name(s). Sources are alphabetized by author last name.

If a source has no named author, alphabetize by the first word of the title or organization name that starts the entry. Ignore articles (“the,” “a,” and “an”) for the purposes of alphabetization.

Sources with multiple authors

For sources with more than one author, only the first author’s name is inverted; subsequent names are written in the normal order.

For texts with up to 10 authors, all the authors’ names should be listed in the order they appear in the source, separated by commas.

If there are more than 10 authors, list the first seven, followed by “et al.”

Multiple sources by the same author

If you include multiple works from the same author, only include the author name in the first entry. In subsequent entries, replace the name with three em dashes, followed by the rest of the citation formatted as normal. List the entries in alphabetical order by title.

Bibliography vs reference list

A reference list is mandatory in Chicago author-date style, where you cite sources in parentheses in the text. The only differences between a Chicago bibliography and a reference list are the heading and the placement of the date.

The reference list is headed “References.” In reference list entries, the publication date is placed immediately after the author’s name. This allows the reader to easily find a reference on the basis of the corresponding in-text citation.

Frequently asked questions about the Chicago bibliography

How do I cite a source with multiple authors in Chicago style?

In a Chicago style footnote, list up to three authors. If there are more than three, name only the first author, followed by “et al.“

In the bibliography, list up to 10 authors. If there are more than 10, list the first seven followed by “et al.”

	Full note	Short note	Bibliography
2 authors	Anna Burns and Robert Smith	Burns and Smith	Burns, Anna, and Robert Smith.
3 authors	Anna Burns, Robert Smith, and Judith Green	Burns, Smith, and Green	Burns, Anna, Robert Smith, and Judith Green.
4+ authors	Anna Burns et al.	Burns et al.	Burns, Anna, Robert Smith, Judith Green, and Maggie White.

The same rules apply in Chicago author-date style.

To automatically generate accurate Chicago references, you can use Scribbr’s free Chicago reference generator.

How do I cite a source with no author in Chicago style?

In a Chicago footnote citation, when the author of a source is unknown (as is often the case with websites), start the citation with the title in a full note. In short notes and bibliography entries, list the organization that published it as the author.

Type	Example
Full note	1. “An Introduction to Research Methods,” Scribbr, accessed June 11, 2020, https://www.scribbr.com/category/methodology/.
Short note	2. Scribbr, “Research Methods.”
Bibliography	Scribbr. “An Introduction to Research Methods.” Accessed June 11, 2020. https://www.scribbr.com/category/methodology/.

In Chicago author-date style, treat the organization as author in your in-text citations and reference list.

To automatically generate accurate Chicago references, you can use Scribbr’s free Chicago reference generator.

How do I cite a source with no date in Chicago style?

When an online source does not list a publication date, replace it with an access date in your Chicago footnotes and your bibliography:

Scribbr. “How to Write a Research Paper.” Accessed June 9, 2020. https://www.scribbr.com/category/research-paper/.

If you are using author-date in-text citations, or if the source was not accessed online, replace the date with “n.d.”

(Scribbr, n.d.)

To automatically generate accurate Chicago references, you can use Scribbr’s free Chicago reference generator.

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

• A reference list is used with Chicago author-date citations.
• A bibliography is used with Chicago footnote citations.

Both present the exact same information; the only difference is the placement of the year in source citations:

• In a reference list entry, the publication year appears directly after the author’s name.
• In a bibliography entry, the year appears near the end of the entry (the exact placement depends on the source type).

There are also other types of bibliography that work as stand-alone texts, such as a Chicago annotated bibliography.

Do I have to include a bibliography or reference list?

In Chicago author-date style, your text must include a reference list. It appears at the end of your paper and gives full details of every source you cited.

In notes and bibliography style, you use Chicago style footnotes to cite sources; a bibliography is optional but recommended. If you don’t include one, be sure to use a full note for the first citation of each source.