Kail, R. V., & Cavanaugh, J. C. (2016). Human development: A life-span view (Seventh edition.). Cengage Learning.
Chicago-viite (17. p.)Kail, Robert V., ja John C. Cavanaugh. Human Development: A Life-span View. Seventh edition. Boston, Massachusetts: Cengage Learning, 2016.
MLA-viite (8. p.)Kail, Robert V., ja John C. Cavanaugh. Human Development: A Life-span View. Seventh edition. Cengage Learning, 2016.
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