International Labour Conference (1972). (1972). Report of the Director General: International Labour Conference Session 57 Report 1 Part 1 Technology for freedom . Man in his environment - the ILO contribution. International Labour Office.
Trích dẫn kiểu ChicagoInternational Labour Conference (1972). Report of the Director General: International Labour Conference Session 57 Report 1 Part 1 Technology for Freedom . Man in His Environment - the ILO Contribution. Geneva: International Labour Office, 1972.
Trích dẫn MLAInternational Labour Conference (1972). Report of the Director General: International Labour Conference Session 57 Report 1 Part 1 Technology for Freedom . Man in His Environment - the ILO Contribution. International Labour Office, 1972.