- The Preserved Counties (Amendment to Boundaries) (Wales) Order 2003. Office of Public Sector Information. 2003-04-01 [2010-09-11].
- 2007 population estimate, calculated using 2003 borders for Blaenau Gwent, Caerphilly, Monmouthshire, Newport, Torfaen. Source: Table 10: Mid-2006 to Mid-2007 Population Estimates, Components of population change for local authorities in the United Kingdom. Office for National Statistics. [2010-09-11]. （原始内容存档于2011-07-28）.