1. (1980). The a priori of the communication community and the foundation of ethics: the problem of a rational foundation of ethics in the scientific age. In (Ed.), Towards a transformation of philosophy. London: Routledge and Kegan Paul.
2. (1946). Language, truth and logic (2nd ed.). London: Victor Gollancz Ltd.
3. & (1994). Principles of biomedical ethics (4th ed.) (pp. 5-62). New York: Oxford University Press.
4. Rational Thinking as a Goal of Therapy
5. & (1979). Cognitive therapy of depression. New York: The Guilford Press.