A reference list in the Chicago author-date style must be included in your content. It appears at the conclusion of your article and contains complete information about each source you mentioned. To reference sources in notes and bibliography format, utilize Chicago style footnotes; a bibliography is optional but encouraged. The Chicago style of writing requires that each footnote be centered on a line of its own and placed at the end of the paragraph it refers to. This can be done by using punctuation to mark the end of the sentence and including enough space after the sentence to properly align the footnote with respect to the paragraph. For example, if I wanted to include a citation that reads "Smith, John Q. "It's me again!" I would need to place this in my document with some space after the sentence and then type the footnote text accordingly. The result should look like this: Smith, John Q. "It's me again!" When referencing multiple sources for a single fact, it is acceptable to use multiple footnotes (one for each source). However, only one footnote may be used on any given line. If you need to reference two different sources on the same line, separate them with commas. For example, let's say I want to refer to the Chicago Manual of Style as well as some other resource on how to format citations. Both manuals recommend placing all parenthetical information in footnotes.