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Dyfyniad Arddull ChicagoPlutchik, Robert. Programmed Learning Aid for Emotion. Homewood, Ill: Learning Systems, 1975.
Dyfyniad MLAPlutchik, Robert. Programmed Learning Aid for Emotion. Learning Systems, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.