Turabian Style for Writing from the OWL at Purdue
"The material in this resource focuses primarily on one of the two CMOS (Chicago Manual of Style) documentation styles: the Notes-Bibliography System (NB), which is used by those in literature, history, and the arts. The other documentation style, the Author-Date System, is nearly identical in content but slightly different in form and is preferred in the social sciences.
In addition to consulting The Chicago Manual of Style (17th ed.) for more information, students may also find it useful to consult Kate L. Turabian's Manual for Writers of Research Papers, Theses, and Dissertations (8th ed.). This manual, which presents what is commonly known as the "Turabian" citation style, follows the two CMOS patterns of documentation but offers slight modifications suited to student texts."