APA (7th ed.) Citation

Widdowson, H. G. (1984). Exploration in applied linguistics 2. Oxford University Press.

Chicago Style (17th ed.) Citation

Widdowson, H. G. Exploration in Applied Linguistics 2. Oxford: Oxford University Press, 1984.

MLA (9th ed.) Citation

Widdowson, H. G. Exploration in Applied Linguistics 2. Oxford University Press, 1984.