Williams, A. (2011). Writing for IELTS. London: Harper Colins Publishers.
シカゴスタイル引用形Williams, Anneli. Writing for IELTS. London: Harper Colins Publishers, 2011.
MLA引用形式Williams, Anneli. Writing for IELTS. London: Harper Colins Publishers, 2011.
警告: この引用は必ずしも正確ではありません.