University of Cambridge. (2008). Key English test extra with answers: Official examination papers from University of Cambridge ESOL Examinations. New York: Cambridge university press.
Style de citation ChicagoUniversity of Cambridge. Key English Test Extra With Answers: Official Examination Papers From University of Cambridge ESOL Examinations. New York: Cambridge university press, 2008.
Style de citation MLAUniversity of Cambridge. Key English Test Extra With Answers: Official Examination Papers From University of Cambridge ESOL Examinations. New York: Cambridge university press, 2008.
Attention : ces citations peuvent ne pas être correctes à 100%.