Cita APA (7a ed.)

Ressler, R. K., & Shachtman, T. (1992). Whoever fights monsters: [my twenty years hunting serial killers for the FBI] (1. ed.). St. Martin's Pr.

Cita Chicago Style (17a ed.)

Ressler, Robert K., y Tom Shachtman. Whoever Fights Monsters: [my Twenty Years Hunting Serial Killers for the FBI]. 1. ed. New York: St. Martin's Pr, 1992.

Cita MLA (8a ed.)

Ressler, Robert K., y Tom Shachtman. Whoever Fights Monsters: [my Twenty Years Hunting Serial Killers for the FBI]. 1. ed. St. Martin's Pr, 1992.