एपीए उद्धरण

Widdowson, H. G. (1995). Principle & practice in applied linguistics. Oxford: Oxford University Press.

शिकागो स्टाइल उद्धरण

Widdowson, H. G. Principle & Practice in Applied Linguistics. Oxford: Oxford University Press, 1995.

एमएलए उद्धरण

Widdowson, H. G. Principle & Practice in Applied Linguistics. Oxford: Oxford University Press, 1995.