APA (7. basım) Alıntı

Drucker, P. F. (1999). Management challenges for the 21st century (First edition.). HarperBusiness.

Chicago Style (17. basım) Atıf

Drucker, Peter F. Management Challenges for the 21st Century. First edition. New York: HarperBusiness, 1999.

MLA (8th ed.) Atıf

Drucker, Peter F. Management Challenges for the 21st Century. First edition. HarperBusiness, 1999.

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