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Dyfyniad Arddull ChicagoRuggiero, Vincent Ryan. Beyond Feelings: A Guide to Critical Thinking. ed. Sherman Oaks, CA: Alfred Publishing Co., 1975.
Dyfyniad MLARuggiero, Vincent Ryan. Beyond Feelings: A Guide to Critical Thinking. ed. Alfred Publishing Co., 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.