Cita APA (7a ed.)

Johnson, B. D., Dunlap, E., & Elmoghazy, E. (1990). Crack Abusers and Noncrack Drug Abusers: A Comparison of Drug Use, Drug Sales, and Nondrug Criminality. American Society of Criminology.

Cita Chicago Style (17a ed.)

Johnson, Bruce D., Eloise Dunlap, y Elsayed Elmoghazy. Crack Abusers and Noncrack Drug Abusers: A Comparison of Drug Use, Drug Sales, and Nondrug Criminality. American Society of Criminology, 1990.

Cita MLA (9a ed.)

Johnson, Bruce D., et al. Crack Abusers and Noncrack Drug Abusers: A Comparison of Drug Use, Drug Sales, and Nondrug Criminality. American Society of Criminology, 1990.