Heyel, C. (1962). Management for modern supervisors. American Management Association.
Chicago Style (17th ed.) ZitazioaHeyel, Carl. Management for Modern Supervisors. New York: American Management Association, 1962.
MLA (9th ed.) ZitazioaHeyel, Carl. Management for Modern Supervisors. American Management Association, 1962.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.