Drucker, P. F. (1980). Managing in turbulent times. Harper & Row; Butterworth-Heinemann.
芝加哥风格引文Drucker, Peter F. Managing in Turbulent Times. New York ; Oxford: Harper & Row; Butterworth-Heinemann, 1980.
MLA引文Drucker, Peter F. Managing in Turbulent Times. Harper & Row; Butterworth-Heinemann, 1980.
警告：这些引文格式不一定是100％准确.