University of Cambridge. (2014). Cambridge preliminary English test 5 audio CD set: Authentic axemination papers from Cambridge ESOL. Việt Nam: Fahasa Printing Factory.
Chicago Style aipamenaUniversity of Cambridge. Cambridge Preliminary English Test 5 Audio CD Set: Authentic Axemination Papers From Cambridge ESOL. Việt Nam: Fahasa Printing Factory, 2014.
MLA aipamenaUniversity of Cambridge. Cambridge Preliminary English Test 5 Audio CD Set: Authentic Axemination Papers From Cambridge ESOL. Việt Nam: Fahasa Printing Factory, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.