Pacula, R. L. (1998). Adolescent alcohol and marijuana consumption: Is there really a gateway effect? National Bureau of Economic Research.
Cita Chicago Style (17a ed.)Pacula, Rosalie Liccardo. Adolescent Alcohol and Marijuana Consumption: Is There Really a Gateway Effect? Cambridge, MA: National Bureau of Economic Research, 1998.
Cita MLA (9a ed.)Pacula, Rosalie Liccardo. Adolescent Alcohol and Marijuana Consumption: Is There Really a Gateway Effect? National Bureau of Economic Research, 1998.
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