APA (7th ed.) Citation

Ballantine, P., & Chan, J. (2010). Geist (Ace mass-market edition.). Ace Books.

Chicago Style (17th ed.) Citation

Ballantine, Philippa, and Jason Chan. Geist. Ace mass-market edition. New York: Ace Books, 2010.

MLA (9th ed.) Citation

Ballantine, Philippa, and Jason Chan. Geist. Ace mass-market edition. Ace Books, 2010.