European Commission. (1996). 85/203/EEC, Council directive of 7 March 1985 on air quality standards for nitrogen dioxide: : provisional, unrevised texts : 9 languages. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Commission. 85/203/EEC, Council Directive of 7 March 1985 On Air Quality Standards for Nitrogen Dioxide: : Provisional, Unrevised Texts : 9 Languages. Luxembourg: Office for Official Publications of the European Communities, 1996.
Παραπομπή MLAEuropean Commission. 85/203/EEC, Council Directive of 7 March 1985 On Air Quality Standards for Nitrogen Dioxide: : Provisional, Unrevised Texts : 9 Languages. Luxembourg: Office for Official Publications of the European Communities, 1996.