APA (7th ed.) Citation

O'Brien, R., & Evans, G. (1992). The encyclopedia of drug abuse. Facts on File.

Chicago Style (17th ed.) Citation

O'Brien, Robert, and Glen Evans. The Encyclopedia of Drug Abuse. New York: Facts on File, 1992.

MLA (9th ed.) Citation

O'Brien, Robert, and Glen Evans. The Encyclopedia of Drug Abuse. Facts on File, 1992.