KOONTZ H., WEIHRICH H., . (1990). ESSENTIALS OF MANAGEMENT. NEW YORK: MCGRAW HILL.
KOONTZ HAROLD, WEIHRICH HEINZ, . 1990. ESSENTIALS OF MANAGEMENT. NEW YORK: MCGRAW HILL.
KOONTZ HAROLD, WEIHRICH HEINZ, . ESSENTIALS OF MANAGEMENT. NEW YORK: MCGRAW HILL. 1990.