Drucker, P. F. (1998). Managing in a time of great change. Butterworth-Heineman.
芝加哥风格引文Drucker, Peter F. Managing in a Time of Great Change. England.-: Butterworth-Heineman, 1998.
MLA引文Drucker, Peter F. Managing in a Time of Great Change. Butterworth-Heineman, 1998.
警告：这些引文格式不一定是100％准确.