Cita APA (7a ed.)

Fox, J. A., & Levin, J. (2005). Extreme killing: Understanding serial and mass murder. Sage Publ.

Cita Chicago Style (17a ed.)

Fox, James Alan, y Jack Levin. Extreme Killing: Understanding Serial and Mass Murder. Thousand Oaks, Calif. [u.a.]: Sage Publ, 2005.

Cita MLA (9a ed.)

Fox, James Alan, y Jack Levin. Extreme Killing: Understanding Serial and Mass Murder. Sage Publ, 2005.