APA aipamena

Drucker, P. F. (2001). Management Challenges for the 21st Century. HarperCollins Publishers.

Chicago Style aipamena

Drucker, Peter F. Management Challenges for the 21st Century. New York: HarperCollins Publishers, 2001.

MLA aipamena

Drucker, Peter F. Management Challenges for the 21st Century. HarperCollins Publishers, 2001.

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