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Dyfyniad Arddull ChicagoRayfield, J.R. The Languages of Bilingual Community. The Hague: Mouton, 1970.
Dyfyniad MLARayfield, J.R. The Languages of Bilingual Community. Mouton, 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.