Williams, A. (2011). Writing for Ielts: Collins English for exams. Tp. Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh.
শিকাগো স্টাইলে সাইটেশনWilliams, Anneli. Writing for Ielts: Collins English for Exams. Tp. Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh, 2011.
এমএলএ সাইটেশনWilliams, Anneli. Writing for Ielts: Collins English for Exams. Tp. Hồ Chí Minh: Tổng hợp Tp. Hồ Chí Minh, 2011.
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