Kostin, L. (1959). Organisation of workers' education in the Soviet Union. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Kostin, Leonid. Organisation of Workers' Education in the Soviet Union. International Labour Organization, 1959.
Citatione MLA (9a ed.)Kostin, Leonid. Organisation of Workers' Education in the Soviet Union. International Labour Organization, 1959.
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