Statistics Netherlands (CBS), Kerncijfers postcodegebieden 2004[1]Archived 27 August 2006 at the Wayback Machine: postcode 1028BB to BE.
knaw.nl
Ad van der Meer and Onno Boonstra, "Repertorium van Nederlandse gemeenten", KNAW, 2006. "KNAW > Publicaties > Detailpagina". Archived from the original on 20 February 2007. Retrieved 3 December 2009.
web.archive.org
Statistics Netherlands (CBS), Kerncijfers postcodegebieden 2004[1]Archived 27 August 2006 at the Wayback Machine: postcode 1028BB to BE.
Ad van der Meer and Onno Boonstra, "Repertorium van Nederlandse gemeenten", KNAW, 2006. "KNAW > Publicaties > Detailpagina". Archived from the original on 20 February 2007. Retrieved 3 December 2009.