University of Cambridge. (2010). Cambridge First Certificate in English 4 with answers: Official examination papers from University of Cambridge ESOL examinations. New York: Cambridge university Press.

University of Cambridge. Cambridge First Certificate in English 4 With Answers: Official Examination Papers From University of Cambridge ESOL Examinations. New York: Cambridge university Press, 2010.

University of Cambridge. Cambridge First Certificate in English 4 With Answers: Official Examination Papers From University of Cambridge ESOL Examinations. New York: Cambridge university Press, 2010.