SISK, H. L., & WILLIAMS, J. C. (1981). Management and organization.-- Ed.4. South-Western.

SISK, Henry L., and J. Clifton WILLIAMS. Management and Organization.-- Ed.4. Cincinnati: South-Western, 1981.

SISK, Henry L., and J. Clifton WILLIAMS. Management and Organization.-- Ed.4. South-Western, 1981.