Cita APA (7th ed.)

Widdowson, H. G. (2012). Teaching language as communication. Oxford University Press.

Cita Chicago (17th ed.)

Widdowson, H. G. Teaching Language as Communication. Oxford: Oxford University Press, 2012.

Cita MLA (8th ed.)

Widdowson, H. G. Teaching Language as Communication. Oxford University Press, 2012.