APA (7th ed.) Citation

Swan, M. (1997). How English works: A grammar practice book (with answers)/ Michael Swan,Catherine Walter. Oxford University Press.

Chicago Style (17th ed.) Citation

Swan, Michael. How English Works: A Grammar Practice Book (with Answers)/ Michael Swan,Catherine Walter. New York: Oxford University Press, 1997.

MLA (8th ed.) Citation

Swan, Michael. How English Works: A Grammar Practice Book (with Answers)/ Michael Swan,Catherine Walter. Oxford University Press, 1997.