APA (7th ed.) Citation
Swan, M. (1992). Practical English Usage (23.impression.). Oxford University Press.
Chicago Style (17th ed.) Citation
Swan, Michael. Practical English Usage. 23.impression. Oxford: Oxford University Press, 1992.
MLA (9th ed.) Citation
Swan, Michael. Practical English Usage. 23.impression. Oxford University Press, 1992.
Warning: These citations may not always be 100% accurate.