APA引文

Williams, A. (2019). Writing for IELTS (Second edition.). HarperCollins.

芝加哥风格引文

Williams, Anneli. Writing for IELTS. Second edition. London: HarperCollins, 2019.

MLA引文

Williams, Anneli. Writing for IELTS. Second edition. HarperCollins, 2019.

警告：这些引文格式不一定是100％准确.