Drucker, P. F. (2001). Management Challenges for the 21st Century. HarperCollins Publishers.
Chicago Style (17th ed.) CitationDrucker, Peter F. Management Challenges for the 21st Century. New York: HarperCollins Publishers, 2001.
MLA (9th ed.) CitationDrucker, Peter F. Management Challenges for the 21st Century. HarperCollins Publishers, 2001.
Warning: These citations may not always be 100% accurate.