Roberts, H. S. (1944). The rubber workers ; labor organization and collective bargaining in the rubber industry. Harper.
Cita Chicago (17th ed.)Roberts, Harold Selig. The Rubber Workers ; Labor Organization and Collective Bargaining in the Rubber Industry. Nwe York and Lonodon: Harper, 1944.
Cita MLA (9th ed.)Roberts, Harold Selig. The Rubber Workers ; Labor Organization and Collective Bargaining in the Rubber Industry. Harper, 1944.
Atenció: Aquestes cites poden no estar 100% correctes.