In Chicago Author-Date style, you tell the reader that you have used a source by placing a parenthetical citation (including author, date, and relevant page numbers) immediately following your reference to that source. You then list all sources alphabetically in a reference list at the end of your paper..
Purdue OWL sample paper in Chicago Author-Date
The Reference List should appear on a separate page at the end of your paper. Entries should be arranged alphabetically by the author's last name. Separate entries with one space.