Cita APA (7a ed.)

Cook, P. J., & Ludwig, J. (2003). Evaluating Gun Policy: Effects on Crime and Violence. Brookings Institution Press.

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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