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APA-referensDrucker, P. F. (2008). The essential Drucker: The best of sixty years of Peter Drucker's essential writings on management (1st Collins Business Essentials pbk. ed.). Collins Business Essentials.
Chicago-stil citatDrucker, Peter F. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management. 1st Collins Business Essentials pbk. ed. New York: Collins Business Essentials, 2008.
MLA-referensDrucker, Peter F. The Essential Drucker: The Best of Sixty Years of Peter Drucker's Essential Writings on Management. 1st Collins Business Essentials pbk. ed. Collins Business Essentials, 2008.
Harvard-stil citatDrucker, P. F. 2008. The essential Drucker: The best of sixty years of Peter Drucker's essential writings on management. 1st Collins Business Essentials pbk. ed. New York: Collins Business Essentials.