Murphy, R., & Châu Thị Hoàng Yến. (2006). Essential grammar in use: A self-study reference and practice book for elementary students of English with answers (Second edition.). Hà Nội: Thanh Niên.
शिकागो स्टाइल उद्धरणMurphy, Raymond., और Châu Thị Hoàng Yến. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Students of English With Answers. Second edition. Hà Nội: Thanh Niên, 2006.
एमएलए उद्धरणMurphy, Raymond., और Châu Thị Hoàng Yến. Essential Grammar in Use: A Self-study Reference and Practice Book for Elementary Students of English With Answers. Second edition. Hà Nội: Thanh Niên, 2006.
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