Swan, M., & Walter, C. (2009). How English works: A grammar practice book with answer. Oxford: Oxford Univ. Press.
Chicago Style CitationSwan, Micheal, and Catherine Walter. How English Works: A Grammar Practice Book With Answer. Oxford: Oxford Univ. Press, 2009.
MLA CitationSwan, Micheal, and Catherine Walter. How English Works: A Grammar Practice Book With Answer. Oxford: Oxford Univ. Press, 2009.
Warning: These citations may not always be 100% accurate.