The official Home Office cat. The National Archives. 1929–1976 [2011-10-30]. (原始内容存档于2011-06-06). Tale of Home Office cat. Metro(英语:Metro (British newspaper))
settlements (PDF). hertsdirect.org. (原始内容 (PDF)存档于26 March 2009). East of England (United Kingdom). citypopulation.de. 2017-06-30 [2019-09-18]. (原始内容存档于2017-09-14)