Revised on. The Chicago Manual of Style provides guidelines for two styles of citing sources: notes, bibliography, and author-date. The author-date style is the preferred option in science and social sciences. In author-date style, an in-text citation includes the author's name, year of publication, and, if applicable, a. The Chicago style for scientific documentation is primarily used in the humanities, particularly in the discipline of history. The manual prescribes two documentation systems: a notes and bibliography system, a NB system and an Author-Date system. The NB system uses footnotes or endnotes and provides the author with the opportunity to comment. The Chicago Manual of Style is the venerable, proven system. guide to style, usage and grammar. It is the indispensable reference for writers, editors, proofreaders, indexers, editors, designers and publishers, informing the editorial canon with sound and definitive advice. Subscribers to the Chicago Manual of Style Online can click on related sections from the cited manual. in several of the answers. For a free one-day trial of CMOS Online, click here. Note: Style guides sometimes disagree. The answers to this quiz are based on the recommendations of the th edition of CMOS. For more information on the Chicago style of notes and bibliography, please visit the Purdue OWL. You can also consult The Chicago Manual of Style from the University of Chicago Press, ed. and/or A Manual for Writers of Research Papers, Theses, and Dissertations by Kate L. Turabian, ed.