Ad van der Meer and Onno Boonstra, Repertorium van Nederlandse gemeenten, KNAW, 2006, p. 191 (Online editionArchived 2012-03-25 at the Wayback Machine)
"Samenstelling college" [Members of the board] (in Dutch). Gemeente Waddinxveen. Archived from the original on 4 November 2013. Retrieved 26 August 2013.
web.archive.org
"Samenstelling college" [Members of the board] (in Dutch). Gemeente Waddinxveen. Archived from the original on 4 November 2013. Retrieved 26 August 2013.
Ad van der Meer and Onno Boonstra, Repertorium van Nederlandse gemeenten, KNAW, 2006, p. 191 (Online editionArchived 2012-03-25 at the Wayback Machine)