University of Cambridge. Local Examinations Syndicate. (2005). Cambridge IELTS 4: Examination papers from the University of Cambridge ESOL Examinations (With answers.). Cambridge University Press.
Chicagoスタイル(17版)引用形式University of Cambridge. Local Examinations Syndicate. Cambridge IELTS 4: Examination Papers from the University of Cambridge ESOL Examinations. With answers. Cambridge: Cambridge University Press, 2005.
MLA(8版)引用形式University of Cambridge. Local Examinations Syndicate. Cambridge IELTS 4: Examination Papers from the University of Cambridge ESOL Examinations. With answers. Cambridge University Press, 2005.
警告: この引用は必ずしも正確ではありません.