1. K. Martin, The Crown and the Establishment (Harmondsworth: Penguin, 1963).
2. J. Murray-Brown (ed.), The Monarchy and its Future (London: Allen & Unwin, 1969)
3. J. P. Morgan, The House of Lords and the Labour Government, 1964–70 (London: Oxford University Press, 1975)
4. Various authors, The Queen (Harmondsworth: Penguin, 1977).