APA (7th ed.) Zitazioa
Ladley, C. (1990). Drugs, society and behavior 90/91 (5th.ed.). Dushkin.
Chicago Style (17th ed.) Zitazioa
Ladley, Charles. Drugs, Society and Behavior 90/91. 5th.ed. Gilford: Dushkin, 1990.
MLA (9th ed.) Zitazioa
Ladley, Charles. Drugs, Society and Behavior 90/91. 5th.ed. Dushkin, 1990.
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