International Labor Office & International Labor Office. Petroleum Committee. (1974). Social problems of contract, sub-contract, and casual labour in the petroleum industry: Report submitted to, and proceedings of, the eighth session of the Petroleum Committee, Geneva, 2-13 April 1973. International Labour Office.
Chicago-viite (17. p.)International Labor Office ja International Labor Office. Petroleum Committee. Social Problems of Contract, Sub-contract, and Casual Labour in the Petroleum Industry: Report Submitted to, and Proceedings of, the Eighth Session of the Petroleum Committee, Geneva, 2-13 April 1973. Geneva: International Labour Office, 1974.
MLA-viite (9. p.)International Labor Office ja International Labor Office. Petroleum Committee. Social Problems of Contract, Sub-contract, and Casual Labour in the Petroleum Industry: Report Submitted to, and Proceedings of, the Eighth Session of the Petroleum Committee, Geneva, 2-13 April 1973. International Labour Office, 1974.