Lê Văn Sự. (2011). 180 đề tài nói tiếng anh: 180 topics for english speaking practice. Hồng Đức.
শিকাগো স্টাইলে সাইটেশনLê Văn Sự. 180 đề Tài Nói Tiếng Anh: 180 Topics for English Speaking Practice. Hồng Đức, 2011.
এমএলএ সাইটেশনLê Văn Sự. 180 đề Tài Nói Tiếng Anh: 180 Topics for English Speaking Practice. Hồng Đức, 2011.
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