Murphy, R. (2015). Essential Grammar in Use: A self-study reference and practice book for elementary learners of English (cuarta edición.). Cambridge University.
Citazione stile Chigago Style (17a edizione)Murphy, Raymond. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Learners of English. cuarta edición. Cambridge: Cambridge University, 2015.
Citatione MLA (9a ed.)Murphy, Raymond. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Learners of English. cuarta edición. Cambridge University, 2015.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.