Dyfyniad APA

Berk, L. E. (2005). Infants, children, and adolescents (Fifth edition.). Pearson.

Dyfyniad Arddull Chicago

Berk, Laura E. Infants, Children, and Adolescents. Fifth edition. New York: Pearson, 2005.

Dyfyniad MLA

Berk, Laura E. Infants, Children, and Adolescents. Fifth edition. Pearson, 2005.

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