APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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