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.
Παραπομπή Chicago StyleVăn 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.
Παραπομπή 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.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.