WEST, M. (1973). Improve your english. Longman.
Lua i Stíl Chicago (17ú heag.)WEST, Michael. Improve Your English. London: Longman, 1973.
Lua MLA (9ú heag.)WEST, Michael. Improve Your English. Longman, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.