Bowler, B. (1999). New headway pronunciation: Upper-intermediate. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Bowler, Bill. New Headway Pronunciation: Upper-intermediate. Oxford: Oxford University Press, 1999.
Lua MLA (9ú heag.)Bowler, Bill. New Headway Pronunciation: Upper-intermediate. Oxford University Press, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.