Cita APA (7a ed.)

Murphy, R. (2007). Essential grammar in use: A self-study reference and practice book for elementary students of english : with answers (3rd ed.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Murphy, Raymond. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Students of English : With Answers. 3rd ed. Cambridge [etc.]: Cambridge University Press, 2007.

Cita MLA (9a ed.)

Murphy, Raymond. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Students of English : With Answers. 3rd ed. Cambridge University Press, 2007.