Dyfyniad APA

(1939). Foundations of educational psychology; nature's gifts to man. Longmans.

Dyfyniad Arddull Chicago

Foundations of Educational Psychology; Nature's Gifts to Man. New York: Longmans, 1939.

Dyfyniad MLA

Foundations of Educational Psychology; Nature's Gifts to Man. Longmans, 1939.

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