1. Buchler, J. (Ed.).Philosophical writings of Peirce. New York: Dover Publications, 1955.
2. Cassirer, E.An essay on man. New Haven: Yale University Press, 1944.
3. Cronbach, L. J. The two disciplines of scientific psychology.American Psychologist, 1957,12, 671–684.
4. Goodman, N.Languages of art. Indianapolis: Bobbs-Merrill, 1968.
5. Hartshore, C, & Weiss, P. (Eds.).Collected papers (8 vols.). Cambridge: Belknap Press, 1960.