Cita APA (7a ed.)

Drucker, P. F. (2005). The Essential Drucker: The best of sixty years of Peter Drucker's Essential Writings on management. Collins Business.

Cita Chicago Style (17a ed.)

Drucker, Peter F. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management. New York: Collins Business, 2005.

Cita MLA (9a ed.)

Drucker, Peter F. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management. Collins Business, 2005.