Place edition information after the name of the editor, translator, or compiler (if there is one). If not, place edition information after the title of the book. End with a period.
Identify the edition by number (2nd ed.), by name (Rev. ed.), or by year (2008 ed.). Use what is indicated on the title page.
Abbreviate the word edition and other descriptive words:
Schott, Joseph and John Priest. Leading Antenatal Classes: A Practical Guide. 2nd ed. Boston: Books for Midwives, 2002. Print.
White, Colon. Foreword. The Patrick O'Brian Muster Book: Persons, Animals, Ships, and Cannon in the Aubrey-Maturin Sea Novels. By Anthony Gary Brown. 2nd ed. Jefferson: McFarland, 2007. 1-2. Print.
If an edition is named on the front page or masthead, add a coma after the date and specify the edition (e.g. natl. ed., late ed., early ed., Coastal ed.).
New York Times 13 July 2002, late ed.: B7+.