(1926). Annual holidays for workers and collective agreements. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Annual Holidays for Workers and Collective Agreements. International Labour Organization, 1926.
Citatione MLA (9a ed.)Annual Holidays for Workers and Collective Agreements. International Labour Organization, 1926.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.