Murphy R. Raymond. (2000). Essential Grammar in Use. A self-study reference and practice book for elementary students of English with Answers: Free pull-out grammar reference pocket guide (2-nd ed.). Cambridge, Cambridge University Press, 2000.
Cita Chicago (17th ed.)Murphy R. Raymond. Essential Grammar in Use. A Self-study Reference and Practice Book for Elementary Students of English with Answers: Free Pull-out Grammar Reference Pocket Guide. 2-nd ed. Cambridge, Cambridge University Press, 2000, 2000.
Cita MLA (9th ed.)Murphy R. Raymond. Essential Grammar in Use. A Self-study Reference and Practice Book for Elementary Students of English with Answers: Free Pull-out Grammar Reference Pocket Guide. 2-nd ed. Cambridge, Cambridge University Press, 2000, 2000.