References
- A Treatise of Human Nature, D. G. C. Mac Nabb. D. Hume, Collins, Glasgow 1962; 1740, book 3, part 1. section 1
- Scruton R. A Short History of Modern Philosophy from Descartes to Wittgenstein. Ark, London 1984
- Lewis C. I. An Analysis of Knowledge and Valuation. London 1964
- Abbott T. K. Groundwork of the Metaphysic of Morals, 6th ed., I. Kant, London 1909
- New English Bible. Oxford University and Cambridge University Press. 1970, Saint Matthew, chapter 22, verses 37–40
- Mellanby K. Human Guinea Pigs. Merlin Press, London 1973
- Huxley A. Anniversary address by the president. Proc. Roy. Soc. A 1984; 391: 215–230