1. Conservative Party Archives. Bodleian Library: University of Oxford.
2. Conservative Central Office. (1968). Make life better. London.
3. Conservative Central Office (1969). ‘The Rt. Hon. Edward Heath, MBE, MP (Bexley), Leader of the Opposition, Speaking at the Caird Hall, Dundee, on Tuesday 9 September, 1969. CPA, CCO, PPB 21.
4. HMSO. (1971). The United Kingdom and the European Communities. Presented to Parliament by the Prime Minister by Command of Her Majesty July 1971. London: HMSO.
5. Royal Commission on the Constitution. (1973). Royal Commission on the Constitution 1969-1973, Volume 2. Memorandum of Dissent by Lord Crowther-Hunt and Professor A. T. Peacock. Cmnd 5460. London: Stationery Office.