Dyfyniad APA

Hoffmann, L. (1988). Developmental psychology today (5th. ed.). Random House.

Dyfyniad Arddull Chicago

Hoffmann, Lois. Developmental Psychology Today. 5th. ed. San Diego: Random House, 1988.

Dyfyniad MLA

Hoffmann, Lois. Developmental Psychology Today. 5th. ed. Random House, 1988.

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