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Chicago Citation Style Guide

Core Elements of Citations

The purpose of footnotes is to give the citation information for a reference directly on the page itself, at the bottom of the page. The number of the footnote corresponds to the superscript number that follows the punctuation mark and/or quotation mark at the end of the sentence being cited. The first time a source is mentioned in the footnotes you give the full citation details. The following notes from the same source use a shortened form (usually the author's last name, page number), or If there are multiple works by the same author, the author's last name, "Article Title," page number.  The examples on the drop-down list on the left all show the Footnote format, the Shortened Note format, and the Bibliography Entry. The numbers of the footnotes then follow in numerical order. Remember, the entries on the bibliography itself ARE NOT NUMBERED.