APA (7e ed.) Bronvermelding

Gruber, J. (2000). Youth smoking in the U.S: Prices and policies. National Bureau of Economic Research.

Chicago (17e ed.) Bronvermelding

Gruber, Jonathan. Youth Smoking in the U.S: Prices and Policies. Cambridge: National Bureau of Economic Research, 2000.

MLA (9e ed.) Bronvermelding

Gruber, Jonathan. Youth Smoking in the U.S: Prices and Policies. National Bureau of Economic Research, 2000.