Murphy, R., & Raymond Murphy. (2007). Essential grammar in use: A self-study reference and practice book for elementary students of English : with answers. Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoMurphy, Raymond, và Raymond Murphy. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Students of English : With Answers. Cambridge: Cambridge University Press, 2007.
MLA引文Murphy, Raymond, và Raymond Murphy. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Students of English : With Answers. Cambridge: Cambridge University Press, 2007.
警告：這些引文格式不一定是100％准確.