Dyfyniad APA
Papalia, D. E., Olds, S. W., & Feldman, R. D. (2004). Human development (9th ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Papalia, Diane E., Sally Wendkos Olds, and Ruth Duskin Feldman. Human Development. 9th ed. Boston: McGraw-Hill, 2004.
Dyfyniad MLA
Papalia, Diane E., et al. Human Development. 9th ed. McGraw-Hill, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.