European Environment Agency., Kvist, E., European Topic Centre on Catalogue of Data Sources., & Swedish Environmental Protection Agency. (1998). Selection criteria for the catalogue of data sources. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Environment Agency., Ebbe Kvist, European Topic Centre on Catalogue of Data Sources, and Swedish Environmental Protection Agency. Selection Criteria for the Catalogue of Data Sources. Luxembourg: Office for Official Publications of the European Communities, 1998.
Παραπομπή MLAEuropean Environment Agency., Ebbe Kvist, European Topic Centre on Catalogue of Data Sources, and Swedish Environmental Protection Agency. Selection Criteria for the Catalogue of Data Sources. Luxembourg: Office for Official Publications of the European Communities, 1998.