Cita APA (7a ed.)

Widdowson, H. G. (1979). Exploration in applied linguistics. Oxford University Press.

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

Widdowson, H. G. Exploration in Applied Linguistics. Oxford University Press, 1979.