Kench, A. (1973). The language of English Business Letters (1st.). Macmillan Education Ltd.
芝加哥风格引文Kench, A. The Language of English Business Letters. 1st. London: Macmillan Education Ltd, 1973.
MLA引文Kench, A. The Language of English Business Letters. 1st. Macmillan Education Ltd, 1973.
警告：这些引文格式不一定是100％准确.