एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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