Certo, S. C. (2009). Modern management concepts and skills. New Jersey: Prentice Hall.
Dyfyniad Arddull ChicagoCerto, Samuel C. Modern Management Concepts and Skills. New Jersey: Prentice Hall, 2009.
Dyfyniad MLACerto, Samuel C. Modern Management Concepts and Skills. New Jersey: Prentice Hall, 2009.
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