Oxford. (2000). Modern English Usage. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Oxford. Modern English Usage. New York: Oxford University Press, 2000.
Lua MLA (9ú heag.)Oxford. Modern English Usage. Oxford University Press, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.