United Nations Conference on Trade and Development & United Nations Conference on Trade and Development. Special Committee on Preferences. (1974). Operation and effects of the generalized system of preferences. United Nations.
Lua i Stíl Chicago (17ú heag.)United Nations Conference on Trade and Development agus United Nations Conference on Trade and Development. Special Committee on Preferences. Operation and Effects of the Generalized System of Preferences. New York: United Nations, 1974.
Lua MLA (8ú heag.)United Nations Conference on Trade and Development agus United Nations Conference on Trade and Development. Special Committee on Preferences. Operation and Effects of the Generalized System of Preferences. United Nations, 1974.
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