APA (7th ed.) Citation

Swan. (1996). Practical English usage (2nd ed. (International student's edition).). Oxford University Press.

Chicago Style (17th ed.) Citation

Swan. Practical English Usage. 2nd ed. (International student's edition). New York: Oxford University Press, 1996.

MLA (8th ed.) Citation

Swan. Practical English Usage. 2nd ed. (International student's edition). Oxford University Press, 1996.