Roberts, H. S. 1. (1966). Roberts' dictionary of industrial relations. BNA Incorporated.
Dyfyniad Arddull ChicagoRoberts, Harold Selig 1911. Roberts' Dictionary of Industrial Relations. Washington: BNA Incorporated, 1966.
Dyfyniad MLARoberts, Harold Selig 1911. Roberts' Dictionary of Industrial Relations. BNA Incorporated, 1966.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.