1. James, W. The Principles of Psychology (Henry Holt and Company, New York, 1890).
2. Wundt, W. M. & Judd, C. H. Outlines of Psychology (Scholarly Press, Cambridge, 1897).
3. Baker, L. R. Folk psychology. In MIT Encyclopedia of Cognitive Science (eds Wilson, R. & Keil, F.) (MIT Press, Cambridge, 1999).
4. Churchland, P. M. A neurocomputational perspective: The nature of mind and the structure of science (MIT Press, Cambridge, 1989).
5. Sellars, W. Empiricism and the Philosophy of Mind (Harvard University Press, Cambridge, 1956).