Cita APA (7a ed.)

Saffer, H., & Chaloupka, F. J. (1999). State drug control spending and illicit drug participation. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Saffer, Henry, y Frank J. Chaloupka. State Drug Control Spending and Illicit Drug Participation. Cambridge, MA: National Bureau of Economic Research, 1999.

Cita MLA (9a ed.)

Saffer, Henry, y Frank J. Chaloupka. State Drug Control Spending and Illicit Drug Participation. National Bureau of Economic Research, 1999.