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Dyfyniad Arddull ChicagoWardhaugh, Ronald. Understanding English Grammar: A Linguistic Approach. Oxford, U.K.: Blackwell, 1995.
Dyfyniad MLAWardhaugh, Ronald. Understanding English Grammar: A Linguistic Approach. Oxford, U.K.: Blackwell, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.