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Dyfyniad Arddull ChicagoO'Connor, Johnson. The Too Many Aptitude Woman. Boston, Mass: Human Engineering Laboratory, 1941.
Dyfyniad MLAO'Connor, Johnson. The Too Many Aptitude Woman. Human Engineering Laboratory, 1941.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.