Widdsowson, H. (1996). Linguistcs. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Widdsowson, H.G. Linguistcs. Oxford University Press, 1996.
Lua MLA (9ú heag.)Widdsowson, H.G. Linguistcs. Oxford University Press, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.