Cita APA (7a ed.)

Harper, L. (2014). Illegal drugs in the US: Markets and trends for marijuana, meth, heroin and cocaine. Nova Publishers.

Cita Chicago Style (17a ed.)

Harper, Lesley. Illegal Drugs in the US: Markets and Trends for Marijuana, Meth, Heroin and Cocaine. New York: Nova Publishers, 2014.

Cita MLA (8a ed.)

Harper, Lesley. Illegal Drugs in the US: Markets and Trends for Marijuana, Meth, Heroin and Cocaine. Nova Publishers, 2014.