Drucker, P. F. (1980). Managing in turbulent times. London: Heinemann.
Trích dẫn kiểu ChicagoDrucker, Peter F. Managing in Turbulent Times. London: Heinemann, 1980.
MLA引文Drucker, Peter F. Managing in Turbulent Times. London: Heinemann, 1980.
警告:這些引文格式不一定是100%准確.