Knight, M. (1967). English at work. Longman.
Lua i Stíl Chicago (17ú heag.)Knight, Michael. English at Work. London: Longman, 1967.
Lua MLA (9ú heag.)Knight, Michael. English at Work. Longman, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.