University of Cambridge. ESOL Examinations. (2013). Cambridge Certificate in Advanced English 4 with answers: Official examination papers from University of Cambridge ESOL examinations (1st published, 4th printing.). Cambridge University Press.
Cita Chicago Style (17a ed.)University of Cambridge. ESOL Examinations. Cambridge Certificate in Advanced English 4 with Answers: Official Examination Papers from University of Cambridge ESOL Examinations. 1st published, 4th printing. Cambridge [etc.]: Cambridge University Press, 2013.
Cita MLA (9a ed.)University of Cambridge. ESOL Examinations. Cambridge Certificate in Advanced English 4 with Answers: Official Examination Papers from University of Cambridge ESOL Examinations. 1st published, 4th printing. Cambridge University Press, 2013.
