APA (7th ed.) Citation

Widdowson, H. G. (1985). Explorations in applied linguistics. University Press.

Chicago Style (17th ed.) Citation

Widdowson, Henry George. Explorations in Applied Linguistics. Oxford [etc.]: University Press, 1985.

MLA (9th ed.) Citation

Widdowson, Henry George. Explorations in Applied Linguistics. University Press, 1985.