Conway, D., & Shirreffs, B. (2003). On Course for IELTS: Student's Book. Oxford University Press.
Chicago Style (17. basım) AtıfConway, Darren, ve Brett Shirreffs. On Course for IELTS: Student's Book. Melbourne: Oxford University Press, 2003.
MLA (9th ed.) AtıfConway, Darren, ve Brett Shirreffs. On Course for IELTS: Student's Book. Oxford University Press, 2003.
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