Dyfyniad APA

Papalia, D. E., Olds, S. W., & Feldman, R. D. (2009). Human development (11th ed.). McGraw-Hill Higher Education.

Dyfyniad Arddull Chicago

Papalia, Diane E., Sally Wendkos Olds, and Ruth Duskin Feldman. Human Development. 11th ed. Boston: McGraw-Hill Higher Education, 2009.

Dyfyniad MLA

Papalia, Diane E., et al. Human Development. 11th ed. McGraw-Hill Higher Education, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.