University of Cambridge. (2011). Cambridge preliminary English test 7 with answers: Examination papers from University of Cambridge ESOL examinations. Việt Nam: Fahasa Printing Factory.
Παραπομπή Chicago StyleUniversity of Cambridge. Cambridge Preliminary English Test 7 With Answers: Examination Papers From University of Cambridge ESOL Examinations. Việt Nam: Fahasa Printing Factory, 2011.
Παραπομπή MLAUniversity of Cambridge. Cambridge Preliminary English Test 7 With Answers: Examination Papers From University of Cambridge ESOL Examinations. Việt Nam: Fahasa Printing Factory, 2011.
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