Não informado. (1971). Industrial Development Abstracts. United Nations, Industrial Development Organization.
Citação do estilo Chicago (17ª ed.)Não informado. Industrial Development Abstracts. New York: United Nations, Industrial Development Organization, 1971.
Citação MLA (8ª ed.)Não informado. Industrial Development Abstracts. United Nations, Industrial Development Organization, 1971.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.