Chicago

Chicago is a referencing system widely used in the arts and humanities.  

There are two styles of Chicago: the ‘notes and bibliography style’ and the ‘author-date style’. The Chicago notes and bibliography style is a footnote referencing style, using numbered footnotes to cite sources in the text. The Chicago author-date style cites sources by the author’s last name and year of publication in the body of the text, similar to APA style. 

Most commonly, when people say ‘Chicago style’, they are referring to Chicago notes and bibliography style, so that will be the focus on this page.  

 

Chicago style guides

Chicago Manual of Style online guides

University guides to Chicago referencing

 

Referencing in Chicago Notes and Bibliography Style

Let's go through the steps of how to use the style guide to reference in Chicago, using the Chicago notes and bibliography style (footnote system).

The bibliography entry

Start by doing the bibliography entry. If you get this right early on, it will save you a lot of time.

 

1. Identify what the source is, where it's from, and who it's by.

Is it a book? A journal article? A government report? A podcast? A blog post? Did you access it online? How many authors does it have? The source's characteristics influence how to reference it.  

 

2. Find a matching example in your style guide.

The aim is to find the closest example possible in the Chicago Notes and Bibliography Style Guide.  

 

3. Write out the reference following the style guide examples.

Your aim at this point is to make the information you have match the order and formatting of the example in the style guide. This includes details such as punctuation, italicisation, and case (e.g. Title Case).   

If you're unsure about how to cite a particular source, remember that the person marking your assignment cares most of all about consistency and having enough information to be able to locate the source themselves. Check over your references to make sure they're following the same principles and formatting. 

 

Footnotes

When you use Chicago notes and bibliography style, you need to use footnotes in the body of your work to show where the information comes from. Footnotes are superscript numbers inserted in your text whenever you use a source. The information about the source of each numbered reference is given at the bottom of each page of your text (in the footer). 

Remember to check the guide carefully.  Footnotes are written differently to bibliography entries, and the first mention of a source in a footnote is written differently to subsequent citations of that source in a footnote (called ‘shortened notes’).  

When writing and formatting the footnote citation of a source, pay attention to differences in the order of the first author’s name, the punctuation, and the page number(s) mentioned, compared to the bibliography entry. 

For subsequent footnote citations of the same source (shortened notes), only essential identifying information is included in the footnote: the author, short title, and relevant page number(s). 

Include page numbers in your footnotes whenever you use quotes, specific data or a paraphrase.  

If you are summarising the main idea of the source (e.g. a book or journal article), you don't need a page number.   

 

Check your guide

Always remember to have your chosen style guide open while you are referencing, even if you use referencing software. It's useful to look out for inconsistencies and to make sure that you have all the right information in the correct order and format. Check out the style guides listed at the top of this page. 

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