European Environment Agency. (2003). Air pollution by ozone in Europe in summer 2003: Overview of exceedances of EC ozone threshold values during the summer season April-August 2003 and comparisions with previous years. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Environment Agency. Air Pollution By Ozone in Europe in Summer 2003: Overview of Exceedances of EC Ozone Threshold Values During the Summer Season April-August 2003 and Comparisions With Previous Years. Luxembourg: Office for Official Publications of the European Communities, 2003.
Παραπομπή MLAEuropean Environment Agency. Air Pollution By Ozone in Europe in Summer 2003: Overview of Exceedances of EC Ozone Threshold Values During the Summer Season April-August 2003 and Comparisions With Previous Years. Luxembourg: Office for Official Publications of the European Communities, 2003.