From our special line of Study Briefs Essentials, the Chicago Manual of Style (CMOS) Essentials is a quick reference resource or convenient refresher to assist in employing this standard documentation and formatting style used in business, publishing, academia and research organizations to name a few. This short guide is intended for anyone needing a quick, reliable overview of the essentials needed to properly format a manuscript or create a Chicago style in-text or bibliographic citation. Compiled by our experts to focus on the most frequently used items, its intent is to give the reader a general review of fundamental facts with useful examples included for reference in a consistently organized and easy to follow compact booklet. Inside you will find a review of general rules and guiding principles. There are up-to-date links that direct you to helpful online resources. A selected set of commonly used bibliographic citations can serve as model entries when you need to create one of your own. CMOS guidelines for composing and formatting documents and full bibliographic entries including annotations are covered. Individual sections address proper use of in-text citations, footnotes, endnotes, direct quotes and paraphrases in CMOS style. Checklists highlighting guidelines for spelling, grammar, usage, punctuation and capitalization rules serve as useful reminders for editing and proofreading tasks. A formatted manuscript example and a special section on proofreader’s marks are also included.