Dyfyniad APA

Papalia, D. E. (2007). Adult development and aging (3rd ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Papalia, Diane E. Adult Development and Aging. 3rd ed. New York: McGraw-Hill, 2007.

Dyfyniad MLA

Papalia, Diane E. Adult Development and Aging. 3rd ed. McGraw-Hill, 2007.

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