Saposs, D. J. (1926). Readings in trade unionism: Labor organization principles and problems as discussed by trade unionists in their official publications and writings. New York: George H. Doran company.

Saposs, David Joseph. Readings in Trade Unionism: Labor Organization Principles and Problems As Discussed By Trade Unionists in Their Official Publications and Writings. New York: George H. Doran company, 1926.

Saposs, David Joseph. Readings in Trade Unionism: Labor Organization Principles and Problems As Discussed By Trade Unionists in Their Official Publications and Writings. New York: George H. Doran company, 1926.