"Sir Edward Heath - Obituary". The Independent. Independent News and Media Limited. 18 July 2005. Archived from the original on 4 February 2006. Retrieved 23 October 2007.
Cavanagh, Michael (2001). "The Campaigns for a Scottish Parliament". Glasgow Digital Library ASPECT. Anderson Library: University of Strathclyde. Retrieved 23 October 2007.
web.archive.org
"Sir Edward Heath - Obituary". The Independent. Independent News and Media Limited. 18 July 2005. Archived from the original on 4 February 2006. Retrieved 23 October 2007.