Murphy, R. (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. 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. 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.