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.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.