Cita APA (7a ed.)

Widdowson, H. G. (1978). Teaching language as communication. Oxford University Press.

Cita Chicago Style (17a ed.)

Widdowson, H. G. Teaching Language as Communication. Great Britain: Oxford University Press, 1978.

Cita MLA (9a ed.)

Widdowson, H. G. Teaching Language as Communication. Oxford University Press, 1978.