Drucker, P. F. (1977). People and performance: The best of Peter Drucker on management. Harper's College Press.
Dyfyniad Arddull ChicagoDrucker, Peter Ferdinand. People and Performance: The Best of Peter Drucker on Management. New York: Harper's College Press, 1977.
Dyfyniad MLADrucker, Peter Ferdinand. People and Performance: The Best of Peter Drucker on Management. Harper's College Press, 1977.
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