Dyfyniad APA

Bowler, B. (1999). New headway pronunciation: Upper-intermediate. Oxford University Press.

Dyfyniad Arddull Chicago

Bowler, Bill. New Headway Pronunciation: Upper-intermediate. Oxford: Oxford University Press, 1999.

Dyfyniad MLA

Bowler, Bill. New Headway Pronunciation: Upper-intermediate. Oxford University Press, 1999.

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