Cita APA (7th ed.)

Chaloupka, F. J. (1999). Do higher cigarette prices encourage youth to use marijuanan. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Chaloupka, Frank J. Do Higher Cigarette Prices Encourage Youth to Use Marijuanan. Cambridge: National Bureau of Economic Research, 1999.

Cita MLA (9th ed.)

Chaloupka, Frank J. Do Higher Cigarette Prices Encourage Youth to Use Marijuanan. National Bureau of Economic Research, 1999.