APA (7th ed.) Citation

Widdowson, H. G. (1988). Teaching language as communication (1st published, 7th impression.). Oxford University Press.

Chicago Style (17th ed.) Citation

Widdowson, Henry George. Teaching Language as Communication. 1st published, 7th impression. Oxford [etc.]: Oxford University Press, 1988.

MLA (9th ed.) Citation

Widdowson, Henry George. Teaching Language as Communication. 1st published, 7th impression. Oxford University Press, 1988.