A Manual for Writers - Turbian
*Note: Use caution when referencing any style resources (including Purdue OWL) outside of the official, published Turabian Manual for Writers.
"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." – Purdue OWL