Murphy Raymond. (2007). Essential grammar in use: A self-study reference and practice book for elementary students of english with answers (3rd ed.). Cambridge university press.
芝加哥风格引文Murphy Raymond. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Students of English with Answers. 3rd ed. New York: 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. 3rd ed. Cambridge university press, 2007.
警告：这些引文格式不一定是100％准确.