Cita APA (7a ed.)

Chaloupka, F. J., Grossman, M., & Tauras, J. A. (1998). The demand for cocaine and marijuana by youth. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Chaloupka, Frank J., Michael Grossman, y John A. Tauras. The Demand for Cocaine and Marijuana by Youth. Cambridge, MA: National Bureau of Economic Research, 1998.

Cita MLA (9a ed.)

Chaloupka, Frank J., et al. The Demand for Cocaine and Marijuana by Youth. National Bureau of Economic Research, 1998.