APA aipamena

Swan, M., & Walter, C. (1997). How english works: A grammar practice book with answers. Oxford: Oxford Univ. Press.

Chicago Style aipamena

Swan, Michael, và Catherine Walter. How English Works: A Grammar Practice Book With Answers. Oxford: Oxford Univ. Press, 1997.

MLA aipamena

Swan, Michael, và Catherine Walter. How English Works: A Grammar Practice Book With Answers. Oxford: Oxford Univ. Press, 1997.