Não informado. (1939). Supervision: The magazine of industrial relations and operating management. National Association of Foremen.
Čikaški stil citiranja (17. izdanje)Não informado. Supervision: The Magazine of Industrial Relations and Operating Management. Burlington, Vt: National Association of Foremen, 1939.
MLA način citiranja (8. izdanje)Não informado. Supervision: The Magazine of Industrial Relations and Operating Management. National Association of Foremen, 1939.
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