United Nations. Statistical Office. (1958). International standard industrial classification of all economic activities. [s.n.].
Chicago-Zitierstil (17. Ausg.)United Nations. Statistical Office. International Standard Industrial Classification of All Economic Activities. New York: [s.n.], 1958.
MLA-Zitierstil (9. Ausg.)United Nations. Statistical Office. International Standard Industrial Classification of All Economic Activities. [s.n.], 1958.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.