United Nations Environment Programme & United Nations Industrial Development Organization. (1991). Audit and reduction manual for industrial emissions and wastes. UNEP.
Chicago-referens (17:e uppl.)United Nations Environment Programme och United Nations Industrial Development Organization. Audit and Reduction Manual for Industrial Emissions and Wastes. Paris: UNEP, 1991.
MLA-referens (9:e uppl.)United Nations Environment Programme och United Nations Industrial Development Organization. Audit and Reduction Manual for Industrial Emissions and Wastes. UNEP, 1991.
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