Eastwood, J. (1999). Oxford practice grammar. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Eastwood, John. Oxford Practice Grammar. Oxford University Press, 1999.
Lua MLA (8ú heag.)Eastwood, John. Oxford Practice Grammar. Oxford University Press, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.