Engel, H. (2004). How to delegate: A guide to getting things done.
芝加哥风格引文Engel, Herbert. How to Delegate: A Guide to Getting Things Done. Mumbai, 2004.
MLA引文Engel, Herbert. How to Delegate: A Guide to Getting Things Done. 2004.
警告：这些引文格式不一定是100％准确.