(1970). International occupational safety health congress. International Labour Office.
Chicago-čujuhus (17. p.)International Occupational Safety Health Congress. Geneva: International Labour Office, 1970.
MLA-čujuhus (9. p.)International Occupational Safety Health Congress. International Labour Office, 1970.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.