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Dyfyniad Arddull ChicagoWardhaugh, Ronald. An Introduction to Sociolinguistics. Chichester, West Sussex, U.K: Wiley-Blackwell, 2010.
Dyfyniad MLAWardhaugh, Ronald. An Introduction to Sociolinguistics. Chichester, West Sussex, U.K: Wiley-Blackwell, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.