(1939). Foundations of educational psychology; nature's gifts to man. Longmans.
Čikaški stil citiranja (17. izdanje)Foundations of Educational Psychology; Nature's Gifts to Man. New York: Longmans, 1939.
MLA način citiranja (9. izdanje)Foundations of Educational Psychology; Nature's Gifts to Man. Longmans, 1939.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.