Dyfyniad APA

Kail, R. V., & Cavanaugh, J. C. (2019). Human development: A life-span view (8th ed.). Cengage.

Dyfyniad Arddull Chicago

Kail, Robert V., and John C. Cavanaugh. Human Development: A Life-span View. 8th ed. Boston, MA: Cengage, 2019.

Dyfyniad MLA

Kail, Robert V., and John C. Cavanaugh. Human Development: A Life-span View. 8th ed. Cengage, 2019.

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