This style has been published for more than 100 years as The Chicago Manual of Style by the University of Chicago Press.
Chicago citation can be styled in two formats which determine how sources are referenced in text. It is important to know which your instructor requires.
Notes-Bibliography - in-text references are cited in numbered endnotes or footnotes with a superscript number.
Author-Date - in-text references are made parenthetically and include the author and publication year.
Turabian is a modified version of Chicago style designed for students and published as A Manual for Writers of Research Papers. It was originally written by Kate L. Turabian and is an official derivative published by the University of Chicago Press.
Like Chicago style, it can also be formatted as Author/Date or Notes/Bibliography. While you can use NoodleTools for Turabian notes/bibliography, when Turabian conflicts with Chicago, Chicago wins in NoodleTools.