APA (7th ed.) Zitazioa

LEWIS, W. C. (1972). Why People Change: The psychology of influence. Holt, Rinehart and Wins-ton.

Chicago Style (17th ed.) Zitazioa

LEWIS, William C. Why People Change: The Psychology of Influence. New York: Holt, Rinehart and Wins-ton, 1972.

MLA (9th ed.) Zitazioa

LEWIS, William C. Why People Change: The Psychology of Influence. Holt, Rinehart and Wins-ton, 1972.