Cita APA (7a ed.)
Ladley, C. (1990). Drugs, society and behavior 90/91 (5th.ed.). Dushkin.
Cita Chicago Style (17a ed.)
Ladley, Charles. Drugs, Society and Behavior 90/91. 5th.ed. Gilford: Dushkin, 1990.
Cita MLA (9a ed.)
Ladley, Charles. Drugs, Society and Behavior 90/91. 5th.ed. Dushkin, 1990.
Precaución: Estas citas no son 100% exactas.