APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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