Dyfyniad APA

Butterfield, J. (2008). Oxford A to Z of english usage. Oxford university press.

Dyfyniad Arddull Chicago

Butterfield, Jeremy. Oxford A to Z of English Usage. Noida: Oxford university press, 2008.

Dyfyniad MLA

Butterfield, Jeremy. Oxford A to Z of English Usage. Oxford university press, 2008.

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