Cita APA (7a ed.)

Murphy Raymond. (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. New York: 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.