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- DRUCKER, Peter F. Management challenges for the 21st century. revised ed. Oxford : Elsevier Butterworth-Heinemann, 2007. 181 s. The classic Drucker collection. ISBN 978-0-7506-8509-2. [Copy count : 1, currently available 0, at library only 1]
- DRUCKER, Peter F. Management challenges for the 21st century. Oxford : Butterworth-Heinemann, 2000. 205 s. ISBN 0-7506-4456-7. [Copy count : 1, currently available 1, at library only 0]