Drucker, P. F. 1. (1999). Management challenges for the 21st century. Oxford: Butterworth-Heinemann.
Trích dẫn kiểu ChicagoDrucker, Peter F. 1909-. Management Challenges for the 21st Century. Oxford: Butterworth-Heinemann, 1999.
MLA引文Drucker, Peter F. 1909-. Management Challenges for the 21st Century. Oxford: Butterworth-Heinemann, 1999.
警告:這些引文格式不一定是100%准確.