Hass, E. (1949). The Socialist Labor Party and the internationals. New York: New York Labor News Company.
Lua i Stíl Chicago (17ú heag.)Hass, Eric. The Socialist Labor Party and the Internationals. New York: New York Labor News Company, 1949.
Lua MLA (8ú heag.)Hass, Eric. The Socialist Labor Party and the Internationals. New York: New York Labor News Company, 1949.
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