Drucker, P. F. (1967). The effective executive. Heinemann.
芝加哥风格引文Drucker, Peter F. The Effective Executive. London: Heinemann, 1967.
MLA引文Drucker, Peter F. The Effective Executive. Heinemann, 1967.
警告：这些引文格式不一定是100％准确.
APA引文