Watson, R. I., & Lindgren, H. C. (1979). Psychology of the child and the adolescent (4th ed.). Macmillan.
Lua i Stíl Chicago (17ú heag.)Watson, Robert Irving, agus Henry Clay Lindgren. Psychology of the Child and the Adolescent. 4th ed. New York: Macmillan, 1979.
Lua MLA (9ú heag.)Watson, Robert Irving, agus Henry Clay Lindgren. Psychology of the Child and the Adolescent. 4th ed. Macmillan, 1979.
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