Shaffer, D. R., & Kipp, K. (2014). Developmental psychology: Childhood and adolescence (9th edition.). Wadsworth Cengage Learning.
Chicago-viite (17. p.)Shaffer, David R., ja Katherine Kipp. Developmental Psychology: Childhood and Adolescence. 9th edition. Australia: Wadsworth Cengage Learning, 2014.
MLA-viite (9. p.)Shaffer, David R., ja Katherine Kipp. Developmental Psychology: Childhood and Adolescence. 9th edition. Wadsworth Cengage Learning, 2014.
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