APA (7th ed.) Zitazioa

Cunningham, S., & Bowler, B. (1999). New headway pronunciation: Intermediate student's practice book. Oxford University Press.

Chicago Style (17th ed.) Zitazioa

Cunningham, Sarah, eta Bill Bowler. New Headway Pronunciation: Intermediate Student's Practice Book. Oxford: Oxford University Press, 1999.

MLA (9th ed.) Zitazioa

Cunningham, Sarah, eta Bill Bowler. New Headway Pronunciation: Intermediate Student's Practice Book. Oxford University Press, 1999.