Lua APA (7ú heag.)

Ladley, C. (1990). Drugs, society and behavior 90/91 (5th.ed.). Dushkin.

Lua i Stíl Chicago (17ú heag.)

Ladley, Charles. Drugs, Society and Behavior 90/91. 5th.ed. Gilford: Dushkin, 1990.

Lua MLA (9ú heag.)

Ladley, Charles. Drugs, Society and Behavior 90/91. 5th.ed. Dushkin, 1990.

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