Παραπομπή APA
European Commission: Directorate-General for Regional Policy. (2009). Promoting sustainable urban development in Europe: Achievements and opportunities. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Commission: Directorate-General for Regional Policy. Promoting Sustainable Urban Development in Europe: Achievements and Opportunities. Luxembourg: Office for Official Publications of the European Communities, 2009.
Παραπομπή MLAEuropean Commission: Directorate-General for Regional Policy. Promoting Sustainable Urban Development in Europe: Achievements and Opportunities. Luxembourg: Office for Official Publications of the European Communities, 2009.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.