APA (7th ed.) Citation

Davis, F., & Rimmer, W. (2011). Active grammar: Level 2 : with answers. Cambridge University Press.

Chicago Style (17th ed.) Citation

Davis, Fiona, and Wayne Rimmer. Active Grammar: Level 2 : With Answers. Cambridge: Cambridge University Press, 2011.

MLA (9th ed.) Citation

Davis, Fiona, and Wayne Rimmer. Active Grammar: Level 2 : With Answers. Cambridge University Press, 2011.