University of Cambridge. (2010). Cambridge preliminary English test 6 with answers: Examination papers from University of Cambridge ESOL examinations: English for Speakers of Other Languages. New York: Cambridge university press.
Παραπομπή Chicago StyleUniversity of Cambridge. Cambridge Preliminary English Test 6 With Answers: Examination Papers From University of Cambridge ESOL Examinations: English for Speakers of Other Languages. New York: Cambridge university press, 2010.
Παραπομπή MLAUniversity of Cambridge. Cambridge Preliminary English Test 6 With Answers: Examination Papers From University of Cambridge ESOL Examinations: English for Speakers of Other Languages. New York: Cambridge university press, 2010.
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