University of Cambridge. (2014). Cambridge key English test 6 with answers: Authentic examination papers from Cambridge ESOL. Việt Nam: Fahasa Printing Factory.
Trích dẫn kiểu ChicagoUniversity of Cambridge. Cambridge Key English Test 6 With Answers: Authentic Examination Papers From Cambridge ESOL. Việt Nam: Fahasa Printing Factory, 2014.
Trích dẫn MLAUniversity of Cambridge. Cambridge Key English Test 6 With Answers: Authentic Examination Papers From Cambridge ESOL. Việt Nam: Fahasa Printing Factory, 2014.
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