APA (7th ed.) Citation

Swan. (2005). Practical English usage (3rd impression.). Oxford University Press.

Chicago Style (17th ed.) Citation

Swan. Practical English Usage. 3rd impression. Oxford: Oxford University Press, 2005.

MLA (9th ed.) Citation

Swan. Practical English Usage. 3rd impression. Oxford University Press, 2005.

Warning: These citations may not always be 100% accurate.