Sigelman, C. K., & Rider, E. A. (2018). Life-span human development (Ninth edition, Student edition.). Cengage Learning.
Chicago-viite (17. p.)Sigelman, Carol K., ja Elizabeth A. Rider. Life-span Human Development. Ninth edition, Student edition. Boston, Massachusetts: Cengage Learning, 2018.
MLA-viite (9. p.)Sigelman, Carol K., ja Elizabeth A. Rider. Life-span Human Development. Ninth edition, Student edition. Cengage Learning, 2018.
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