European Commission. (1996). 80/779/EEC, Council directive of 15 July 1980 on air quality limit values and guide values for sulphur dioxide and suspended particulates: Provisional, unrevised texts : 9 languages. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Commission. 80/779/EEC, Council Directive of 15 July 1980 On Air Quality Limit Values and Guide Values for Sulphur Dioxide and Suspended Particulates: Provisional, Unrevised Texts : 9 Languages. Luxembourg: Office for Official Publications of the European Communities, 1996.
Παραπομπή MLAEuropean Commission. 80/779/EEC, Council Directive of 15 July 1980 On Air Quality Limit Values and Guide Values for Sulphur Dioxide and Suspended Particulates: Provisional, Unrevised Texts : 9 Languages. Luxembourg: Office for Official Publications of the European Communities, 1996.