Amazon.com: The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management (Collins Business Essentials): 9780061345012: Drucker, Peter F.: Books
Post-Capitalist Society: Drucker, Peter F.: 9780887306617: Amazon.com: Books
The Effective Executive: The Definitive Guide to Getting the Right Things Done (Harperbusiness Essentials): Drucker, Peter F.: 9780060833459: Amazon.com: Books