1. Angeles, P. A. (1981). Dictionary of philosophy. New York: Barnes and Noble Books.
2. Argyris, C., & Schon, D. A. (1974). Theory in practice: Increasing professional effectiveness. San Francisco: Jossey-Bass.
3. Bhaskar, R. (1979). The possibility of naturalism. Brighton: Harvester Press.
4. Bhaskar, R. (1986). Scientific realism and human emancipation. London: Verso.
5. Bhaskar, R. (1993). Dialectic: The pulse of freedom. London: Verso.