United Nations. Industrial development Organization. (1974). Industrial development survey. s.n.
Cita Chicago (17th ed.)United Nations. Industrial development Organization. Industrial Development Survey. New York: s.n, 1974.
Cita MLA (9th ed.)United Nations. Industrial development Organization. Industrial Development Survey. s.n, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.