APA
United Nation. Economic Commission for Europe, United Nation. Economic Commission for Europe, . (1991). Rational use of water and its treatment in the chemical industry. New: York United Nations USA.
Chicago
United Nation. Economic Commission for Europe, United Nation. Economic Commission for Europe, . 1991. Rational use of water and its treatment in the chemical industry. New: York United Nations USA.
Harvard
United Nation. Economic Commission for Europe, United Nation. Economic Commission for Europe, . (1991). Rational use of water and its treatment in the chemical industry. New: York United Nations USA.
MLA
United Nation. Economic Commission for Europe, United Nation. Economic Commission for Europe, . Rational use of water and its treatment in the chemical industry. New: York United Nations USA. 1991.