APA-referens (7:e uppl.)

Widdowson, H. G. (1990). Aspects of language teaching (1a. ed.). Oxford University Press.

Chicago-referens (17:e uppl.)

Widdowson, H. G. Aspects of Language Teaching. 1a. ed. Oxford: Oxford University Press, 1990.

MLA-referens (9:e uppl.)

Widdowson, H. G. Aspects of Language Teaching. 1a. ed. Oxford University Press, 1990.