DuBrin, A. J. (1997). Essentials of management (Fourth edition.). South-Western College Publishing.
Dyfyniad Arddull ChicagoDuBrin, Andrew J. Essentials of Management. Fourth edition. Cincinnati, Ohio: South-Western College Publishing, 1997.
Dyfyniad MLADuBrin, Andrew J. Essentials of Management. Fourth edition. South-Western College Publishing, 1997.
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