APA (7th ed.) Citation

Ressler, R. K., & Perkins, T. (2016). Whoever fights monsters: My twenty years tracking serial killers for the fbi (Unabridged.). Tantor Media.

Chicago Style (17th ed.) Citation

Ressler, Robert K., and Tom Perkins. Whoever Fights Monsters: My Twenty Years Tracking Serial Killers for the Fbi. Unabridged. Old Saybrook: Tantor Media, 2016.

MLA (8th ed.) Citation

Ressler, Robert K., and Tom Perkins. Whoever Fights Monsters: My Twenty Years Tracking Serial Killers for the Fbi. Unabridged. Tantor Media, 2016.

Warning: These citations may not always be 100% accurate.