APA (7th ed.) Citation

Becker, G. S., Murphy, K. M., & Grossman, M. (2004). The economic theory of illegal goods: The case of drugs. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Becker, Gary S., Kevin M. Murphy, and Michael Grossman. The Economic Theory of Illegal Goods: The Case of Drugs. Cambridge, Mass: National Bureau of Economic Research, 2004.

MLA (9th ed.) Citation

Becker, Gary S., et al. The Economic Theory of Illegal Goods: The Case of Drugs. National Bureau of Economic Research, 2004.