United Nations Conference on Trade and Development. (1985). Collusive tendering: Study. United Nations.
Cita Chicago (17th ed.)United Nations Conference on Trade and Development. Collusive Tendering: Study. New York: United Nations, 1985.
Cita MLA (8th ed.)United Nations Conference on Trade and Development. Collusive Tendering: Study. United Nations, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.