1. Robert Potter, The English Morality Play, London: Routledge and Kegan Paul, 1975.
2. G. Cooper and C. Worthan (eds), The Summoning of Everyman, Nederlands, W.A.: Western Australian Press, 1980.
3. St Thomas Aquinas, Summa Theologia, quoted in Ronald Rolheiser, The Restless Heart, London: Hodder and Stoughton, 1979.
4. Francesco Petrarca, De Vita Solitaria, Leiden: Universitaire Pers Leiden, 1990.
5. William Shakespeare, ‘As You Like It’, III.2, in The Works of William Shakespeare, London: Basil Blackwell, 1947.