Vince, M. (1998). Intermediate language practice. Macmillan Heinemann.
Lua i Stíl Chicago (17ú heag.)Vince, Michael. Intermediate Language Practice. Oxford, U.K.: Macmillan Heinemann, 1998.
Lua MLA (8ú heag.)Vince, Michael. Intermediate Language Practice. Macmillan Heinemann, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.