United Nations. Economic Commission for Europe & United nations. (1993). Chemical manufacturers' associations and related organisations: Directory of chemical producers and products. UN.
Цитирование в стиле Чикаго (17-е изд.)United Nations. Economic Commission for Europe и United nations. Chemical Manufacturers' Associations and Related Organisations: Directory of Chemical Producers and Products. New York: UN, 1993.
Цитирование MLA (8-е изд.)United Nations. Economic Commission for Europe и United nations. Chemical Manufacturers' Associations and Related Organisations: Directory of Chemical Producers and Products. UN, 1993.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.