O'Brien, R., & Evans, G. (1992). The encyclopedia of drug abuse. Facts on File.
Cita Chicago (17th ed.)O'Brien, Robert, i Glen Evans. The Encyclopedia of Drug Abuse. New York: Facts on File, 1992.
Cita MLA (9th ed.)O'Brien, Robert, i Glen Evans. The Encyclopedia of Drug Abuse. Facts on File, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.