Organizace spojených národů. Statistical Office. International standard industrial classification of all economic activities. 3rd rev. ed. New York: United Nations, 1990. x, 189 s. Statistical papers. Series M; no. 4.
(1990). International standard industrial classification of all economic activities (3rd rev. ed.). New York: United Nations.
Styl ChicagoInternational Standard Industrial Classification of All Economic Activities. 3rd rev. ed. New York: United Nations, 1990.
Citace podle MLAInternational Standard Industrial Classification of All Economic Activities. 3rd rev. ed. New York: United Nations, 1990.
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