National Council of Labour Colleges (NCLC). (1930). The Plebs: Organ of the National Council of Labour Colleges. London: NCLC Publishing Society.
Lua i Stíl Chicago (17ú heag.)National Council of Labour Colleges (NCLC). The Plebs: Organ of the National Council of Labour Colleges. London: NCLC Publishing Society, 1930.
Lua MLA (8ú heag.)National Council of Labour Colleges (NCLC). The Plebs: Organ of the National Council of Labour Colleges. London: NCLC Publishing Society, 1930.
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