(2011). Cambridge key English test with answers: Examination papers from University of Cambridge ESOL examinations: English for speakers of other languagé. Cambridge: Cambridge University Press.
Chicago-tyylinen lähdeviittausCambridge Key English Test With Answers: Examination Papers From University of Cambridge ESOL Examinations: English for Speakers of Other Languagé. Cambridge: Cambridge University Press, 2011.
MLA-viiteCambridge Key English Test With Answers: Examination Papers From University of Cambridge ESOL Examinations: English for Speakers of Other Languagé. Cambridge: Cambridge University Press, 2011.
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