Viala, R. (1952). Labour conditions in the diamond-cutting industry. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Viala, R. Labour Conditions in the Diamond-cutting Industry. International Labour Organization, 1952.
Citatione MLA (9a ed.)Viala, R. Labour Conditions in the Diamond-cutting Industry. International Labour Organization, 1952.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.