There are two types of Chicago-style source citations: (1) notes and bibliography and (2) author-date. Check with your teacher to make sure you are using the correct style.
You may also hear it called Chicago-Turabian or simply Turabian style citations. This is after Kate Turabian's A Manual for Writers of Research Papers, Theses, and Dissertations which is Chicago style and writing tips for students and others writing in an academic setting.
Your teacher may have slightly different formatting and citation standards than these resources. Always use your teacher's specifications.