Soars, L., & Soars, J. (1996). New Headway English Course: Intermediate Workbook : with key (4th impression.). Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Soars, Liz, agus John Soars. New Headway English Course: Intermediate Workbook : With Key. 4th impression. Oxford: Oxford University Press, 1996.
Lua MLA (8ú heag.)Soars, Liz, agus John Soars. New Headway English Course: Intermediate Workbook : With Key. 4th impression. Oxford University Press, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.