APA (7th ed.) Citation

Swan, M., & Walter-Laager, C. (1997). How English works: A grammar practice book ; with answers (3. impr.). Oxford Univ. Pr.

Chicago Style (17th ed.) Citation

Swan, Michael, and Catherine Walter-Laager. How English Works: A Grammar Practice Book ; with Answers. 3. impr. Oxford [u.a.]: Oxford Univ. Pr, 1997.

MLA (9th ed.) Citation

Swan, Michael, and Catherine Walter-Laager. How English Works: A Grammar Practice Book ; with Answers. 3. impr. Oxford Univ. Pr, 1997.