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Dyfyniad Arddull ChicagoEllis, Rod. Understanding Second Language Acquisition. Second edition. Oxford: Oxford University Press, 2015.
Dyfyniad MLAEllis, Rod. Understanding Second Language Acquisition. Second edition. Oxford University Press, 2015.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.