Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.