Cita APA (7a ed.)

Widdowson, H. (1979). Explorations in applied linguistics. Oxford University.

Cita Chicago Style (17a ed.)

Widdowson, H.G. Explorations in Applied Linguistics. Oxford: Oxford University, 1979.

Cita MLA (9a ed.)

Widdowson, H.G. Explorations in Applied Linguistics. Oxford University, 1979.