APA
United Nations. Economic Commission For Europe, . (1980). Conservation of energy in the chemical industry. New York: United Nations.
Chicago
United Nations. Economic Commission For Europe, . 1980. Conservation of energy in the chemical industry. New York: United Nations.
Harvard
United Nations. Economic Commission For Europe, . (1980). Conservation of energy in the chemical industry. New York: United Nations.
MLA
United Nations. Economic Commission For Europe, . Conservation of energy in the chemical industry. New York: United Nations. 1980.