United Nations Industrial Development Organization. (1979). Appropriate industrial technology for low-cost transport for rural areas. United Nations.
Cita Chicago (17th ed.)United Nations Industrial Development Organization. Appropriate Industrial Technology for Low-cost Transport for Rural Areas. New York: United Nations, 1979.
Cita MLA (9th ed.)United Nations Industrial Development Organization. Appropriate Industrial Technology for Low-cost Transport for Rural Areas. United Nations, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.