MLA

Cernikovsky, Libor, et al. 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 Comparision with Previous Years. Copenhagen: European environment agency, 2003.

APA

Cernikovsky, L., De Leeuw, F., Fiala, J., & van Aalst, R. (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 comparision with previous years. Copenhagen: European environment agency.

Chicago

Cernikovsky, Libor, Frank De Leeuw, Jaroslav Fiala, and Roel van Aalst. 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 Comparision with Previous Years. Copenhagen: European environment agency, 2003.