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.
Chicago-стиль цитированияUniversity 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-цитированиеUniversity 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.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.