Cullen, P. (2014). The official Cambridge guide to IELTS for academic & general training: Student's book with answers. Cambridge: Cambridge University Press.
シカゴスタイル引用形Cullen, Pauline. The Official Cambridge Guide to IELTS for Academic & General Training: Student's Book With Answers. Cambridge: Cambridge University Press, 2014.
MLA引用形式Cullen, Pauline. The Official Cambridge Guide to IELTS for Academic & General Training: Student's Book With Answers. Cambridge: Cambridge University Press, 2014.
警告: この引用は必ずしも正確ではありません.