The Chicago Manual of Style has two basic citation formats: the humanities style or Notes & Bibliography with footnotes/endnotes and a bibliography (used in History, Literature, and the Arts) and the Author/Date style with in-text citations and a source list (used in Social Sciences and Science).
Regardless of your citation style, the purpose remains the same: to give credit to another author whose ideas you have used, consulted, or adapted in your own work. This helps you avoid plagiarism and demonstrate your ability to think critically and synthesize ideas from a variety of sources.
The McCulloch Chicago Manual Quick Guide is based on The Chicago Manual of Style, 17th edition. University of Chicago Press, 2017.