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Citing Sources

Guidelines and examples for the Chicago Style

Miscellaneous

For English-language book titles, the « headline style » is commonly used: the first letters of all words are capitalised,  except the articles (the, a), the prepositions and conjunctions (and, or), to and as. The first word of the title or subtitle is also capitalised.

For non-English titles, it is recommended to follow the usages of the language concerned, or the sentence style if the writer is unfamiliar with these usages. In French titles, only the first word of the title (but not the subtitle) and proper names are capitalised.

For successive entries by a same author or editor, a 3-em dash (followed by a period or comma as in the previous entry) replaces the name(s) after the first appearance.  In the « notes and bibliography » system, titles by the same author are normally listed alphabetically. An initial an or the is ignored in the alphabetising.  In the « author-date » system, entries are arranged chronologically by year of publication.

The abbreviation ibid. (from ibidem, « in the same place ») refers to a single work cited in the  note immediately preceding, and must never be used if the preceding note contains more than one citation. It may also be used within one note in successive references to the same work. The Chicago Style disallows the use of op. cit. used with an author’s last name and standing in place of a previously cited title, sometimes many pages or even chapters earlier, because they are “exceptionally unhelpful” and frustrating for the reader. 

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