APA

Widdowson H. G., . (2002). Aspects of Language Teaching. Oxford: Open University Press.

Chicago

Widdowson H G, . 2002. Aspects of Language Teaching. Oxford: Open University Press.

Harvard

Widdowson H. G., . (2002). Aspects of Language Teaching. Oxford: Open University Press.

MLA

Widdowson H G, . Aspects of Language Teaching. Oxford: Open University Press. 2002.