APA (7th ed.) Citation

Riley, K. J. (1997). Crack, powder cocaine, and heroin: Drug purchase and use patterns in six US cities. National Institute of Justice [u.a.].

Chicago Style (17th ed.) Citation

Riley, K. Jack. Crack, Powder Cocaine, and Heroin: Drug Purchase and Use Patterns in Six US Cities. Washington, DC: National Institute of Justice [u.a.], 1997.

MLA (8th ed.) Citation

Riley, K. Jack. Crack, Powder Cocaine, and Heroin: Drug Purchase and Use Patterns in Six US Cities. National Institute of Justice [u.a.], 1997.