Shaffer, D. R. (2002). Developmental psychology: Childhood and adolescence (Sixth edition.). Wadsworth Thomson Learning.
Chicago-viite (17. p.)Shaffer, David R. Developmental Psychology: Childhood and Adolescence. Sixth edition. Belmont, CA: Wadsworth Thomson Learning, 2002.
MLA-viite (9. p.)Shaffer, David R. Developmental Psychology: Childhood and Adolescence. Sixth edition. Wadsworth Thomson Learning, 2002.
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