APA (7th ed.) Citation

Nelson, J. C. (2015). Armageddon rules (Ace mass-market edition.). Ace Books.

Chicago Style (17th ed.) Citation

Nelson, J. C. Armageddon Rules. Ace mass-market edition. New York: Ace Books, 2015.

MLA (9th ed.) Citation

Nelson, J. C. Armageddon Rules. Ace mass-market edition. Ace Books, 2015.