APA
United Nations Conference on Trade and Development (Geneva), . (1985). International trade in the petrochemical sector. New York: United Nations.
Chicago
United Nations Conference on Trade and Development (Geneva), . 1985. International trade in the petrochemical sector. New York: United Nations.
Harvard
United Nations Conference on Trade and Development (Geneva), . (1985). International trade in the petrochemical sector. New York: United Nations.
MLA
United Nations Conference on Trade and Development (Geneva), . International trade in the petrochemical sector. New York: United Nations. 1985.