United Nations. Economic Commission for Europe. (1983). Catalogue of building systems and components approved at the national level and aimed at international trade: Agreed format and example catalogue. United Nations.
Style de citation Chicago (17e éd.)United Nations. Economic Commission for Europe. Catalogue of Building Systems and Components Approved at the National Level and Aimed at International Trade: Agreed Format and Example Catalogue. New York: United Nations, 1983.
Style de citation MLA (8e éd.)United Nations. Economic Commission for Europe. Catalogue of Building Systems and Components Approved at the National Level and Aimed at International Trade: Agreed Format and Example Catalogue. United Nations, 1983.
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