1. Aiken, L. R. (1999). Human differences. Mahwah, NJ: Lawrence Erlbaum Associates.
2. Aronson, E. (1984). The social animal (4th ed.). New York: Freeman.
3. Austin, J. L. (1965). How to do things with words. New York: Oxford University Press.
4. Axelrod, R. (1984). The evolution of cooperation. New York: Basic Books.
5. Baars, B. J., & Gage, N. M. (Eds.). (2010). Cognition, brain, and consciousness: Introduction to cognitive neuroscience (2nd ed.). Boston: Academic.