Cita APA (7th ed.)

Cook, P. J., & Laub, J. H. (2001). After the epidemic: Recent trends in youth violence in the United States. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Cook, Philip J., i John H. Laub. After the Epidemic: Recent Trends in Youth Violence in the United States. Cambridge: National Bureau of Economic Research, 2001.

Cita MLA (9th ed.)

Cook, Philip J., i John H. Laub. After the Epidemic: Recent Trends in Youth Violence in the United States. National Bureau of Economic Research, 2001.