ALEXANDER, L. (1989). Practice and progress: An integrated course for pre-intermediate students. Longman.
芝加哥风格引文ALEXANDER, L.G. Practice and Progress: An Integrated Course for Pre-intermediate Students. London: Longman, 1989.
MLA引文ALEXANDER, L.G. Practice and Progress: An Integrated Course for Pre-intermediate Students. Longman, 1989.
警告：这些引文格式不一定是100％准确.