(2004). European research spending for renewable energy sources. Office for Official Publications of the European Communities.
Chicago-Zitierstil (17. Ausg.)European Research Spending for Renewable Energy Sources. Luxembourg: Office for Official Publications of the European Communities, 2004.
MLA-Zitierstil (9. Ausg.)European Research Spending for Renewable Energy Sources. Office for Official Publications of the European Communities, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.