The Chicago Manual of Style (CMOS) is often used to document sources for papers in the humanities (e.g. history, fine arts, and political science).
The purpose of documentation is to:
The Chicago Manual of Style (17th ed.) recognizes two basic styles of citation. This guide is intended as a quick and abridged guide for the Notes and Bibliography system only. The complete details of the Notes and Bibliography system and the second Author-Date system are documented in the CMOS guide available on reserve at the Check Out Desk.