Cita APA (7th ed.)

Modell, W., & Lansing, A. (1969). Drugs. Time-Life Books.

Cita Chicago (17th ed.)

Modell, Walter, i Alfred Lansing. Drugs. New York: Time-Life Books, 1969.

Cita MLA (9th ed.)

Modell, Walter, i Alfred Lansing. Drugs. Time-Life Books, 1969.