LEWIS, W. C. (1972). Why People Change: The psychology of influence. Holt, Rinehart and Wins-ton.
Chicago-viite (17. p.)LEWIS, William C. Why People Change: The Psychology of Influence. New York: Holt, Rinehart and Wins-ton, 1972.
MLA-viite (9. p.)LEWIS, William C. Why People Change: The Psychology of Influence. Holt, Rinehart and Wins-ton, 1972.
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