Dyfyniad APA

(1990). Headway pronunciation: Intermediate. New York: Oxford University Press.

Dyfyniad Arddull Chicago

Headway Pronunciation: Intermediate. New York: Oxford University Press, 1990.

Dyfyniad MLA

Headway Pronunciation: Intermediate. New York: Oxford University Press, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.