Cita APA (7a ed.)

Fox, J. A., & Levin, J. (2012). Extreme killing: Understanding serial and mass murder (2. ed.). Sage Publications.

Cita Chicago Style (17a ed.)

Fox, James Alan, y Jack Levin. Extreme Killing: Understanding Serial and Mass Murder. 2. ed. Los Angeles [u.a.]: Sage Publications, 2012.

Cita MLA (8a ed.)

Fox, James Alan, y Jack Levin. Extreme Killing: Understanding Serial and Mass Murder. 2. ed. Sage Publications, 2012.