Heyel, C. (1982). The Encyclopedia of management (3rd ed.). Van Nostrand Reinhold.
Cita Chicago (17th ed.)Heyel, Carl. The Encyclopedia of Management. 3rd ed. New York: Van Nostrand Reinhold, 1982.
Cita MLA (9th ed.)Heyel, Carl. The Encyclopedia of Management. 3rd ed. Van Nostrand Reinhold, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.