APA (7th ed.) Citation

Swan, M. (1990). Practical English usage (19th impr.). Oxford University Press.

Chicago Style (17th ed.) Citation

Swan, Michael. Practical English Usage. 19th impr. Oxford: Oxford University Press, 1990.

MLA (9th ed.) Citation

Swan, Michael. Practical English Usage. 19th impr. Oxford University Press, 1990.

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