Gaya APA

Murphy, R. (2015). Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Learners of English: With Answers (keempat). United Kingdom: Cambridge University Press.

Gaya MLA

Murphy, Raymond. "Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Learners of English: With Answers". keempat United Kingdom: Cambridge University Press, 2015. Text.