Não informado. (1989). UNCTAD review. United Nations Conference on Trade and Development.
Chicago-referens (17:e uppl.)Não informado. UNCTAD Review. Geneva, Suíça: United Nations Conference on Trade and Development, 1989.
MLA-referens (8:e uppl.)Não informado. UNCTAD Review. United Nations Conference on Trade and Development, 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.