APA (7th ed.) Citation
Swan, M. (2009). Practical English usage (3rd ed.). Oxford University Press.
Chicago Style (17th ed.) Citation
Swan, Michael. Practical English Usage. 3rd ed. Oxford: Oxford University Press, 2009.
MLA (9th ed.) Citation
Swan, Michael. Practical English Usage. 3rd ed. Oxford University Press, 2009.
Warning: These citations may not always be 100% accurate.