Swan, M., & Walter, C. (1997). How English works: A grammar practice book with answers. New York: Oxford University Press.
Chicago Style CitationSwan, Michael, and Catherin Walter. How English Works: A Grammar Practice Book With Answers. New York: Oxford University Press, 1997.
MLA CitationSwan, Michael, and Catherin Walter. How English Works: A Grammar Practice Book With Answers. New York: Oxford University Press, 1997.
Warning: These citations may not always be 100% accurate.