The Chicago Manual of Style requires you to list all of your sources at the end of your paper in a section called the Bibliography. You also need to cite your sources when you quote or paraphrase them in the text of your paper. For in-text citations, the Chicago Manual of Style allows you to choose between using footnotes or using parenthetical citations. The footnote version of Chicago is called the Notes-Bibliography system. The parenthetical version of Chicago is called the Author-Date system. You can use either system, but be sure to be consistent.
Resources for the Notes-Bibliography system (footnotes):
Resources for the Author-Date system (parenthetical citations):
The Chicago Manual of Style, 17th Edition by 
Manual for Writers of Research Papers, Theses, and Dissertations: Chicago Style for Students and Researchers, Ninth Edition by