APA

Widdowson H., Seidlhofer B. & Cook G. (1995). Principle & practice in applied linguistics: studies in honour of H.G. Widdowson. Oxford: Oxford University Press.

Chicago

Widdowson H.G, Seidlhofer Barbara and Cook Guy. 1995. Principle & practice in applied linguistics: studies in honour of H.G. Widdowson. Oxford: Oxford University Press.

Harvard

Widdowson H., Seidlhofer B. and Cook G. (1995). Principle & practice in applied linguistics: studies in honour of H.G. Widdowson. Oxford: Oxford University Press.

MLA

Widdowson H.G, Seidlhofer Barbara and Cook Guy. Principle & practice in applied linguistics: studies in honour of H.G. Widdowson. Oxford: Oxford University Press. 1995.