According to the Modern Languages Association style guide, or MLA, books should be cited in the following format: author, title, city of publication, publisher, year of publication and method of publication, such as print or e-book. Here is an example: DeLillo, Don. Underworld. New York: Scribner, 1997. Print.
Additional rules apply if the cited book is translated, republished, reprinted as a new edition or has more than one author. For example, if a book is republished, the original date of publication is listed immediately after the title. Here is an example: Darwin, Charles. The Origin of Species. 1859. New York: Bantam Books, 1999. Print. Likewise, if the book is translated or reprinted as a new edition, the translator's name or edition number is provided immediately after the title. List all cited books on a separate page at the end of the paper or work.
The author can also quote directly from his references by using in-text citations, which help the reader quickly locate the passage in the referenced material. According to the MLA style guide, in-text citations are formatted by placing the author's last name and the page number of the quotation in parentheses immediately following the quote. Here is an example: The sky is described as "low and gray" (DeLillo 11).
Other style guides require the same information for book citations but have slightly different formats. These include the Associated Press, the Chicago Manual and the American Psychological Association.