APA (7th ed.) Citation

Swan & Walter. (2000). How English works: A grammar practice book with answer (6th impressions , 14th impressions 2004.). Oxford University Press.

Chicago Style (17th ed.) Citation

Swan and Walter. How English Works: A Grammar Practice Book with Answer. 6th impressions , 14th impressions 2004. New York: Oxford University Press, 2000.

MLA (8th ed.) Citation

Swan and Walter. How English Works: A Grammar Practice Book with Answer. 6th impressions , 14th impressions 2004. Oxford University Press, 2000.