Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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