APA citiranje

Grogger, J., & Willis, M. (1998). The introduction of crack cocaine: And the rise in urban crime rates. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Grogger, Jeff, and Mike Willis. The Introduction of Crack Cocaine: And the Rise in Urban Crime Rates. Cambridge: National Bureau of Economic Research, 1998.

MLA citiranje

Grogger, Jeff, and Mike Willis. The Introduction of Crack Cocaine: And the Rise in Urban Crime Rates. National Bureau of Economic Research, 1998.