(EN) Ivor Crewe, Margaret Thatcher: As the British Saw Her (PDF), in The Public Perspective, gennaio 1991. URL consultato il 1º marzo 2017.
«Thatcher ceased to outshine her party. For the first six years of her premiership, irrespective of conservative fortunes, her popularity consistently ran about 5% ahead of her party's. She was therefore a potential vote puller in an election campaign. Between the Westland affair in early 1986 and the October 1989 resignation of her Chancellor of the Exchequer, Nigel Lawson, she ran equally with her party. But thereafter she ran 3 or 4% behind and in that sense had become an electoral burden.»
