(1927). Membership of trade unions during the years 1921-1926. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Membership of Trade Unions During the Years 1921-1926. International Labour Organization, 1927.
Citatione MLA (9a ed.)Membership of Trade Unions During the Years 1921-1926. International Labour Organization, 1927.
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