Commons, J. R. (1967). Trade unionism and labor problems. A. M. Kelley.
Lua i Stíl Chicago (17ú heag.)Commons, John Rogers. Trade Unionism and Labor Problems. New York: A. M. Kelley, 1967.
Lua MLA (9ú heag.)Commons, John Rogers. Trade Unionism and Labor Problems. A. M. Kelley, 1967.
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