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Dyfyniad Arddull ChicagoFrankenstein, Carl. They Think Again: Restoring Cognitive Abilities Through Teaching. New York: Van Nostrand Reinhold, 1979.
Dyfyniad MLAFrankenstein, Carl. They Think Again: Restoring Cognitive Abilities Through Teaching. Van Nostrand Reinhold, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.