Cita APA (7a ed.)

Murphy, R. (1999). Essential grammar in use: A self-study reference and practice book for elementary students of english. With answers (2nd ed.). Cambridge University.

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. 2nd ed. Cambridge: Cambridge University, 1999.

Cita MLA (9a ed.)

Murphy, Raymond. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Students of English. With Answers. 2nd ed. Cambridge University, 1999.