- Author: Nicola McEwen, Luis Moreno
- Language: English
- Year: 2005
- Author: John Curtice, David McCrone, Nicola McEwen, Michael Marsh, Rachel Ormston
- Language: English
- Year: 2009
- Author: John Curtice, David McCrone, Nicola McEwen, Michael Marsh, Rachel Ormston
- Language: English
- Year: 2009