"Chicago" or "Turabian" style is the name given to documentation widely used in history and some of the other social sciences. It is based on the Chicago Manual of Style and its laypersons' edition, Kate L. Turabian's A Manual for Writers of Term Papers, Theses, and Dissertations. The links below will take you to some useful sources of information on Turabian style.

A Brief Guide to Chicago Style from the University of Wisconsin- Madison