SWAN, M. (2005). Practical English usage. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)SWAN, Michael. Practical English Usage. Oxford University Press, 2005.
Lua MLA (9ú heag.)SWAN, Michael. Practical English Usage. Oxford University Press, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.