APA (7th ed.) Citation

Caulkins, J. P., & Sevigny, E. L. (2005). How many people does the U.S. imprison for drug use, and who are they? Contemporary drug problems, 32, 405-428.

Chicago Style (17th ed.) Citation

Caulkins, Jonathan P., and Eric L. Sevigny. "How Many People Does the U.S. Imprison for Drug Use, and Who Are They?" Contemporary Drug Problems 32 (2005): 405-428.

MLA (9th ed.) Citation

Caulkins, Jonathan P., and Eric L. Sevigny. "How Many People Does the U.S. Imprison for Drug Use, and Who Are They?" Contemporary Drug Problems, vol. 32, 2005, pp. 405-428.