Παραπομπή APA
Aalst, R. M. v., & European Environment Agency. (2000). Air quality: Annual topic update 1999. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleAalst, Roel M. van., and European Environment Agency. Air Quality: Annual Topic Update 1999. Luxembourg: Office for Official Publications of the European Communities, 2000.
Παραπομπή MLAAalst, Roel M. van., and European Environment Agency. Air Quality: Annual Topic Update 1999. Luxembourg: Office for Official Publications of the European Communities, 2000.
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