Drucker, P. F. (2007). The essential Drucker: Selections from the management works of Peter F. Drucker (Classic Drucker Collection ed.). Elsevier.
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Chicago-čujuhus (17. p.)
Drucker, Peter F. The Essential Drucker: Selections from the Management Works of Peter F. Drucker. Classic Drucker Collection ed. Oxford, UK: Elsevier, 2007.
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MLA-čujuhus (9. p.)
Drucker, Peter F. The Essential Drucker: Selections from the Management Works of Peter F. Drucker. Classic Drucker Collection ed. Elsevier, 2007.
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