APA (7th ed.) Citation

Widdowson, H. G. (1983). Learning purpose and language use. Oxford University Press.

Chicago Style (17th ed.) Citation

Widdowson, H. G. Learning Purpose and Language Use. Oxford: Oxford University Press, 1983.

MLA (9th ed.) Citation

Widdowson, H. G. Learning Purpose and Language Use. Oxford University Press, 1983.