Cita APA (7a ed.)

Murphy R. Raymond. (2011). Essential Grammar in Use. A self-study Reference and Practice Book for elementary Students of English with answers (3rd ed.). Cambridge, Cambridge University Press, 2011.

Cita Chicago Style (17a ed.)

Murphy R. Raymond. Essential Grammar in Use. A Self-study Reference and Practice Book for Elementary Students of English with Answers. 3rd ed. Cambridge, Cambridge University Press, 2011, 2011.

Cita MLA (9a ed.)

Murphy R. Raymond. Essential Grammar in Use. A Self-study Reference and Practice Book for Elementary Students of English with Answers. 3rd ed. Cambridge, Cambridge University Press, 2011, 2011.