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Dyfyniad Arddull ChicagoHarmer, Jeremy. How to Teach English. Harlow: Pearson Longman, 2007.
Dyfyniad MLAHarmer, Jeremy. How to Teach English. Harlow: Pearson Longman, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.