Sarah Cunningham. (1994). Heaway: Intermediate pronunciation. H: Thế Giới.
Dyfyniad Arddull ChicagoSarah Cunningham. Heaway: Intermediate Pronunciation. H: Thế Giới, 1994.
Dyfyniad MLASarah Cunningham. Heaway: Intermediate Pronunciation. H: Thế Giới, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.