APA (7th ed.) Citation

Swan, M. (1995). Practical English usage (2nd ed., 2nd impression.). Oxford University Press.

Chicago Style (17th ed.) Citation

Swan, Michael. Practical English Usage. 2nd ed., 2nd impression. Oxford: Oxford University Press, 1995.

MLA (9th ed.) Citation

Swan, Michael. Practical English Usage. 2nd ed., 2nd impression. Oxford University Press, 1995.