APA (7th ed.) Zitazioa

Butterfield, J. (2007). Oxford A-Z of English usage. Oxford University Press.

Chicago Style (17th ed.) Zitazioa

Butterfield, Jeremy. Oxford A-Z of English Usage. Oxford: Oxford University Press, 2007.

MLA (9th ed.) Zitazioa

Butterfield, Jeremy. Oxford A-Z of English Usage. Oxford University Press, 2007.