Ficheiro:Ridderkerk Netherlands.svgDescriptionRidderkerk Netherlands.svg Flag of Ridderkerk, in South Holland province, the Netherlands. Date 4.5.08 Source Own work Author Nethunter SVG development
Ficheiro:Vlag Ridderkerk.pngDescriptionVlag Ridderkerk.png Flag of municipality Ridderkerk, South Holland, the Netherlands Date 24 December 2006 (original upload date) Source Transferred