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- DRUCKER, Peter F. The effective executive. Oxford : Elsevier Butterworth-Heinemann, 2007. 167 s. The classic Drucker collection. ISBN 978-0-7506-8507-8. [Copy count : 1, currently available 0, at library only 1]
- DRUCKER, Peter F. The Effective Executive. 1. ed. New York : Harper Business, 1993. 178 s. ISBN 0-88730-612-8. [Copy count : 1, currently available 1, at library only 0]