Văn Hào. (2010). Cambridge IELTS 6: Examination papers from the University of Cambridge ESOL Examinations: English for Speaker of Other Languages. Hà Nội: Từ điển Bách khoa.
Styl cytowania ChicagoVăn Hào. Cambridge IELTS 6: Examination Papers From the University of Cambridge ESOL Examinations: English for Speaker of Other Languages. Hà Nội: Từ điển Bách khoa, 2010.
Styl cytowania MLAVăn Hào. Cambridge IELTS 6: Examination Papers From the University of Cambridge ESOL Examinations: English for Speaker of Other Languages. Hà Nội: Từ điển Bách khoa, 2010.
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