APA (7th ed.) Citation

Koontz, D. R. (2009). Relentless: A novel (First edition.). Bantam Books.

Chicago Style (17th ed.) Citation

Koontz, Dean R. Relentless: A Novel. First edition. New York: Bantam Books, 2009.

MLA (9th ed.) Citation

Koontz, Dean R. Relentless: A Novel. First edition. Bantam Books, 2009.