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Dyfyniad Arddull ChicagoChase, Stuart. The Proper Study of Mankind: An Inquiry into the Science of Human Relations. New York: Harper, 1948.
Dyfyniad MLAChase, Stuart. The Proper Study of Mankind: An Inquiry into the Science of Human Relations. Harper, 1948.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.