University of Cambridge. (2012). Cambridge key English test 6 with answers: Official examination papers from University of Cambridge ESOL Examinations. Việt Nam: Fahasa Printing Factory.
Chicago-стиль цитированияUniversity of Cambridge. Cambridge Key English Test 6 With Answers: Official Examination Papers From University of Cambridge ESOL Examinations. Việt Nam: Fahasa Printing Factory, 2012.
MLA-цитированиеUniversity of Cambridge. Cambridge Key English Test 6 With Answers: Official Examination Papers From University of Cambridge ESOL Examinations. Việt Nam: Fahasa Printing Factory, 2012.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.