Schell, E. H. (1951). Technique of administration: Administrative proficiency in business. McGraw-Hill.
Citace podle Chicago (17th ed.)Schell, Erwin Haskell. Technique of Administration: Administrative Proficiency in Business. New York: McGraw-Hill, 1951.
Citace podle MLA (9th ed.)Schell, Erwin Haskell. Technique of Administration: Administrative Proficiency in Business. McGraw-Hill, 1951.
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