Schell, E. H. (1924). The technique of executive control. McGraw-Hill.
Cita Chicago (17th ed.)Schell, Erwin Haskell. The Technique of Executive Control. New York: McGraw-Hill, 1924.
Cita MLA (9th ed.)Schell, Erwin Haskell. The Technique of Executive Control. McGraw-Hill, 1924.
Atenció: Aquestes cites poden no estar 100% correctes.