Dowling, William F. How managers motivate : the imperatives of supervision / William F. Dowling, Leonard R. Sayles. - 2d ed. - New York : McGraw-Hill, c1978. - xii, 450 p. : ill. ; 24 cm. ISBN: 007017668X Subjects--Topical Terms: Supervision of employees. Supervisors. Dewey Class. No.: 658.314 / DOW