1. Sir John Fortescue, The Governance of England, Charles Plummer (ed.) (Oxford University Press, 1885), pp. 14–15; W. Denton, England in the Fifteenth Century (London: George Bell, 1888), pp. 273–4.
2. R. L. Storey, The End of the House of Lancaster (London: Barrie and Rockliff, 1966), pp. 9
3. M. Prestwich, The Three Edwards: War and State in England, 1272–1377 (London: Methuen, 1980), pp. 165–244
4. M. H. Keen, England in the Later Middle Ages (London: Methuen, 1973), pp. 143–65
5. J. R. Lander, The Limitations of the English Monarchy in the Later Middle Ages (Toronto: University of Toronto Press, 1989).