Παραπομπή APA
Jensen, S., & European Environment Agency. (1999). Catalogue of data sources: Annual topic update 1998. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleJensen, Stefan., and European Environment Agency. Catalogue of Data Sources: Annual Topic Update 1998. Luxembourg: Office for Official Publications of the European Communities, 1999.
Παραπομπή MLAJensen, Stefan., and European Environment Agency. Catalogue of Data Sources: Annual Topic Update 1998. Luxembourg: Office for Official Publications of the European Communities, 1999.
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