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Dyfyniad Arddull ChicagoLerner, Janet W. Learning Disabilities: Theories, Diagnosis, and Teaching Strategies. 8th ed. Boston: Houghton Mifflin, 2000.
Dyfyniad MLALerner, Janet W. Learning Disabilities: Theories, Diagnosis, and Teaching Strategies. 8th ed. Boston: Houghton Mifflin, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.