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.
استشهاد بنمط شيكاغوMurphy, Raymond., و 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.
MLA استشهادMurphy, Raymond., و 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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.