Hobbs M. Martyn & Keddle J. S. Julia Star. (2007). Commerce 2: Student's book. Oxford, Oxford University Press, 2007.
Lua i Stíl Chicago (17ú heag.)Hobbs M. Martyn agus Keddle J. S. Julia Star. Commerce 2: Student's Book. Oxford, Oxford University Press, 2007, 2007.
Lua MLA (9ú heag.)Hobbs M. Martyn agus Keddle J. S. Julia Star. Commerce 2: Student's Book. Oxford, Oxford University Press, 2007, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.