APA (7th ed.) Citation

Swan, M. (2016). Practical English usage (4th edition.). Oxford University Press.

Chicago Style (17th ed.) Citation

Swan, Michael. Practical English Usage. 4th edition. Oxford ; New York: Oxford University Press, 2016.

MLA (9th ed.) Citation

Swan, Michael. Practical English Usage. 4th edition. Oxford University Press, 2016.

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