Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

Warning: These citations may not always be 100% accurate.