University of Cambridge. (2014). Cambridge preliminary English test 6 audio CD set: Authentic examination papers from Cambridge ESOL. Việt Nam: Fahasa Printing Factory.
Chicago-стиль цитированияUniversity of Cambridge. Cambridge Preliminary English Test 6 Audio CD Set: Authentic Examination Papers From Cambridge ESOL. Việt Nam: Fahasa Printing Factory, 2014.
MLA-цитированиеUniversity of Cambridge. Cambridge Preliminary English Test 6 Audio CD Set: Authentic Examination Papers From Cambridge ESOL. Việt Nam: Fahasa Printing Factory, 2014.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.