University of Cambridge. (2014). Cambridge preliminary English test 6 audio CD set: Authentic examination papers from Cambridge ESOL. Việt Nam: Fahasa Printing Factory.
استشهاد بنمط شيكاغوUniversity of Cambridge. Cambridge Preliminary English Test 6 Audio CD Set: Authentic Examination Papers From Cambridge ESOL. Việt Nam: Fahasa Printing Factory, 2014.
MLA استشهادUniversity of Cambridge. Cambridge Preliminary English Test 6 Audio CD Set: Authentic Examination Papers From Cambridge ESOL. Việt Nam: Fahasa Printing Factory, 2014.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.