APA citiranje

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

Chicago Style (17th ed.) Citation

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

MLA citiranje

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