Dyfyniad APA

Berk, L. E. (2008). Infants, children, and adolescents (6th ed.). Person.

Dyfyniad Arddull Chicago

Berk, Laura E. Infants, Children, and Adolescents. 6th ed. Boston: Person, 2008.

Dyfyniad MLA

Berk, Laura E. Infants, Children, and Adolescents. 6th ed. Person, 2008.

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