1. Ashcroft, Lord. 2019. How Britain Voted and Why.
lordashcroftpolls.com/category/elections
, 12 December.
2. Butler, D.E., and U. Kitzinger. 1976. The 1975 Referendum. London: Macmillan.
3. Cash, Sir W. 2019. Hansard, vol. 661, Column 697. London: House of Commons, 12 June.
4. Converse, P.E. 1970. Attitudes and Non-Attitudes. In The Quantitative Analysis of Social Problems, ed. E.R. Tufte, 168–189. Reading, MA: Addison-Wesley.
5. Eurobarometer. 2019. Closer to the Citizens, Closer to the Ballot. Brussels: European Commission.