Cita APA (7a ed.)

Krouse, W. J., & Richardson, D. J. (2015). Mass Murder With Firearms: Incidents and Victims, 1999-2013. Congressional Research Service.

Cita Chicago Style (17a ed.)

Krouse, William J., y Daniel J. Richardson. Mass Murder With Firearms: Incidents and Victims, 1999-2013. [Erscheinungsort nicht ermittelbar]: Congressional Research Service, 2015.

Cita MLA (9a ed.)

Krouse, William J., y Daniel J. Richardson. Mass Murder With Firearms: Incidents and Victims, 1999-2013. Congressional Research Service, 2015.