University of Cambridge. (2007). Cambridge preliminary English test 4 with answers: Examination papers from University of Cambridge ESOL examinations: English for Speakers of Other Languages. New York: Cambridge university press.
Trích dẫn kiểu ChicagoUniversity of Cambridge. Cambridge Preliminary English Test 4 With Answers: Examination Papers From University of Cambridge ESOL Examinations: English for Speakers of Other Languages. New York: Cambridge university press, 2007.
MLA CitationUniversity of Cambridge. Cambridge Preliminary English Test 4 With Answers: Examination Papers From University of Cambridge ESOL Examinations: English for Speakers of Other Languages. New York: Cambridge university press, 2007.
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