International Labour Office. (1969). International catalogue of occupational safety and health films (6th ed.). International Labour Office.
Citazione stile Chigago Style (17a edizione)International Labour Office. International Catalogue of Occupational Safety and Health Films. 6th ed. Geneva: International Labour Office, 1969.
Citatione MLA (8a ed.)International Labour Office. International Catalogue of Occupational Safety and Health Films. 6th ed. International Labour Office, 1969.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.