DOWLING, W. F., & SAYLES, L. R. (1978). How managers motivate: The imperatives of supervision. McGraw-hill.

DOWLING, William F., and Leonard R. SAYLES. How Managers Motivate: The Imperatives of Supervision. New York: McGraw-hill, 1978.

DOWLING, William F., and Leonard R. SAYLES. How Managers Motivate: The Imperatives of Supervision. McGraw-hill, 1978.