Each of the links on this guide will take you to the Chicago Manual of Style, which will give you several examples for how to cite that item.
Determine who the author is of your book. Special considerations here: Is the book written by an author, or assembled by an editor? Has the book been translated? If any of these answers are yes, then make sure to credit any editors or translators.
Decide what's unique about this book. What edition is it? Is it in a series? Does it have a volume number? You'll want to include this information on your citation!
Using an eBook? Make sure to include information about the place you obtained the book. You can either give the name of the database or the platform, as appropriate.
Is your book compiled by an editor, with each chapter having its own author? Make sure to cite the chapter author as the primary author instead of the editor.
Are you citing a dissertation? Make sure to include the type of thesis, the author's institution, and the date. You'll also need to put the title of the dissertation into quotation marks instead of italics.