Papalia, D. E., Olds, S. W., & Feldman, R. D. (1998). A child's world: Infancy through adolescence (8th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Papalia, Diane E., Sally Wendkos Olds, agus Ruth Duskin Feldman. A Child's World: Infancy Through Adolescence. 8th ed. Boston: McGraw-Hill, 1998.
Lua MLA (8ú heag.)Papalia, Diane E., et al. A Child's World: Infancy Through Adolescence. 8th ed. McGraw-Hill, 1998.
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