Statutes of the Party of European Socialists (adopted by the 7th PES congress, 7 - 8 December 2006 in Porto) (2006)
Electronic ed.: Brussels, [2006]. - Speicherung: 19.02.2013. - Adresse: www.pes.eu/sites/www.pes.org/files/images/downloads/PESStatutes2006EN.pdf