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Dyfyniad Arddull ChicagoWhat You Need to Know About British & American English. Singapore: Learners Pub, 2004.
Dyfyniad MLAWhat You Need to Know About British & American English. Singapore: Learners Pub, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.