1. Aristotle: 1941, The Rhetoric, R. McKeon (trans.), Random House, New York.
2. Cicero: 1949, De Inventione, H. M. Hubbell (trans.), Harvard University Press, Cambridge, I, 33?44.
3. Hare, R. M.: 1981, Moral Thinking: Its Levels, Method and Point, Clarendon Press, Oxford, p. 5.
4. Jonsen, A. R.: 1980, ?Can an ethicist be a consultant??, in V. Abernathy (ed.), Frontiers in Medical Ethics, Ballinger, Cambridge.
5. Jonsen, A. R., Siegler, M., Winslade, W.: 1982, Clinical Ethics, Macmillan Publishing Co., New York.