Παραπομπή APA
European Environment Agency., Jol, A., & Kielland, G. (1997). Air pollution in Europe 1997. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Environment Agency., Andre Jol, and Gabriel Kielland. Air Pollution in Europe 1997. Luxembourg: Office for Official Publications of the European Communities, 1997.
Παραπομπή MLAEuropean Environment Agency., Andre Jol, and Gabriel Kielland. Air Pollution in Europe 1997. Luxembourg: Office for Official Publications of the European Communities, 1997.
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