Rowland, V. K. (1958). Improving Managerial Performance. New York: Harper & Brothers.
Dyfyniad Arddull ChicagoRowland, Virgil K. Improving Managerial Performance. New York: Harper & Brothers, 1958.
Dyfyniad MLARowland, Virgil K. Improving Managerial Performance. New York: Harper & Brothers, 1958.
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