Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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