APA (7th ed.) Citation

McNamara, T., & Widdowson, H. G. (2000). Language testing. Oxford University Press.

Chicago Style (17th ed.) Citation

McNamara, Tim, and H. G. Widdowson. Language Testing. Oxford: Oxford University Press, 2000.

MLA (8th ed.) Citation

McNamara, Tim, and H. G. Widdowson. Language Testing. Oxford University Press, 2000.