Hughes J. John & Naunton J. Jon. (2008). Business Result. Intermediate: Class CDs. New York, Oxford University Press, 2008.
Lua i Stíl Chicago (17ú heag.)Hughes J. John agus Naunton J. Jon. Business Result. Intermediate: Class CDs. New York, Oxford University Press, 2008, 2008.
Lua MLA (9ú heag.)Hughes J. John agus Naunton J. Jon. Business Result. Intermediate: Class CDs. New York, Oxford University Press, 2008, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.