Greenbaum, S. (2008). The Oxford English grammer. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Greenbaum, Sidney. The Oxford English Grammer. New Delhi: Oxford University Press, 2008.
Lua MLA (9ú heag.)Greenbaum, Sidney. The Oxford English Grammer. Oxford University Press, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.