Cita APA (7a ed.)

Fox, J. A., & Levin, J. (2015). Extreme killing: Understanding serial and mass murder (3. ed.). Sage Publ.

Cita Chicago Style (17a ed.)

Fox, James Alan, y Jack Levin. Extreme Killing: Understanding Serial and Mass Murder. 3. ed. Los Angeles [u.a.]: Sage Publ, 2015.

Cita MLA (8a ed.)

Fox, James Alan, y Jack Levin. Extreme Killing: Understanding Serial and Mass Murder. 3. ed. Sage Publ, 2015.