Harrison, M. (2012). Complete IELTS: Workbook with answers. Cambridge: Cambridge Univeristy.
シカゴスタイル引用形Harrison, Mark. Complete IELTS: Workbook With Answers. Cambridge: Cambridge Univeristy, 2012.
MLA引用形式Harrison, Mark. Complete IELTS: Workbook With Answers. Cambridge: Cambridge Univeristy, 2012.
警告: この引用は必ずしも正確ではありません.