Cita APA (7a ed.)

Ludwig, J., & Cook, P. J. (2003). Evaluating gun policy: Effects on crime and violence. Brookings Institution Press.

Cita Chicago Style (17a ed.)

Ludwig, Jens, y Philip J. Cook. Evaluating Gun Policy: Effects on Crime and Violence. Washington, D.C.: Brookings Institution Press, 2003.

Cita MLA (8a ed.)

Ludwig, Jens, y Philip J. Cook. Evaluating Gun Policy: Effects on Crime and Violence. Brookings Institution Press, 2003.