Cullen, Pauline
Cambridge vocabulary for ielts with answers : self-study vocabulary practice
Cambridge university press, 2010
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Hopkins, Diane
Cambridge grammar for IELTS.
Cambridge University Press, 2006
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Cambridge IELTS 6 : examination papers from University of Cambridge ESOL examinations
Cambridge University Press, 2007
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Cambridge IELTS 6 : examination papers from University of Cambridge ESOL examinations
Cambridge University Press, 2007
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Cambridge IELTS 7 : examination papers from University of Cambridge ESOL examinations
Cambridge University Press, 2009
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