University of Cambridge ESOL Examinations. (2007). Cambridge IELTS 6 Student's Book with Answers: Examination papers from University of Cambridge ESOL Examinations. Cambridge University Press.
Citace podle Chicago (17th ed.)University of Cambridge ESOL Examinations. Cambridge IELTS 6 Student's Book with Answers: Examination Papers from University of Cambridge ESOL Examinations. Cambridge: Cambridge University Press, 2007.
Citace podle MLA (9th ed.)University of Cambridge ESOL Examinations. Cambridge IELTS 6 Student's Book with Answers: Examination Papers from University of Cambridge ESOL Examinations. Cambridge University Press, 2007.
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