1. Berger, P. L., & Luckmann, T. (1967). The Social Construction of Reality. New York: Doubleday.
2. Hoyningen-Huene, P. (1990). ‘Kuhn’s Conception of Incommensurability.’ Studies in History and Philosophy of Science 21, 481–492.
3. Joellenbeck, L. M., Zwanziger, L. L., Durch, J. S., & Strom, B. L. (Eds.) (2002). The Anthrax Vaccine: Is it Safe? Does it Work? Washington, D.C.: Institute of Medicine.
4. Kluckhohn, F. R., & Strodtbeck, F. L. (1961). Variations in Value Orientations. Evanston, Illinois: Row, Peterson and Company.
5. Kohler, W. (1966). The Place of Value in a World of Facts. New York: Mentor Books.