Não informado. (1971). Industrial Development Abstracts. United Nations, Industrial Development Organization.
Chicago-Zitierstil (17. Ausg.)Não informado. Industrial Development Abstracts. New York: United Nations, Industrial Development Organization, 1971.
MLA-Zitierstil (8. Ausg.)Não informado. Industrial Development Abstracts. United Nations, Industrial Development Organization, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.