Alexander, L. G. Mainline skills A (student's book). Longman Group Ltd.,c1975.
芝加哥风格引文Alexander, L. G. Mainline Skills A (student's Book). London: Longman Group Ltd.,c1975.
MLA引文Alexander, L. G. Mainline Skills A (student's Book). Longman Group Ltd.,c1975.
警告：这些引文格式不一定是100％准确.