European Environment Agency. (1999). Catalogue of data sources: Annual topic update .. Office for Official Publ. of the European Communities.
Chicago-Zitierstil (17. Ausg.)European Environment Agency. Catalogue of Data Sources: Annual Topic Update .. Luxembourg: Office for Official Publ. of the European Communities, 1999.
MLA-Zitierstil (9. Ausg.)European Environment Agency. Catalogue of Data Sources: Annual Topic Update .. Office for Official Publ. of the European Communities, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.