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Dyfyniad Arddull ChicagoRescher, Nicholas. Scholastic Meditations. Washington, D.C.: Catholic University of America Press, 2005.
Dyfyniad MLARescher, Nicholas. Scholastic Meditations. Catholic University of America Press, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.