Dyfyniad APA

Shaffer, D. R. (1989). Developmental psychology: Childhood and adolescence (2nd ed.). Brooks/Cole.

Dyfyniad Arddull Chicago

Shaffer, David R. Developmental Psychology: Childhood and Adolescence. 2nd ed. Pacific Grove, Calif.: Brooks/Cole, 1989.

Dyfyniad MLA

Shaffer, David R. Developmental Psychology: Childhood and Adolescence. 2nd ed. Brooks/Cole, 1989.

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