Jakeman, V. (2003). Insight into IELTS: Extra with answers : workbook. Cambridge: Cambridge University Press.
シカゴスタイル引用形Jakeman, Vanessa. Insight Into IELTS: Extra With Answers : Workbook. Cambridge: Cambridge University Press, 2003.
MLA引用形式Jakeman, Vanessa. Insight Into IELTS: Extra With Answers : Workbook. Cambridge: Cambridge University Press, 2003.
警告: この引用は必ずしも正確ではありません.