1. Alloy, L., and L. Abramson. 1979. Judgment of contingency in depressed and nondepressed subjects. Sadder but wiser? Journal of Experimental Psychology 108: 441–485.
2. Baltes, P., and U. Staudinger. 1996. Interactive minds in a life-span perspective: Prologue. In Interactive minds. Life-span perspectives on the social foundation of cognition, ed. P. Baltes, and U. Staudinger, 1–32. Cambridge: Cambridge University Press.
3. Block, G., and M. Drucker. 1992. Rescuers: Portraits of moral courage in the Holocaust. New York: Holmes and Meier.
4. Confucius. 1938. The Analects (trans: Waley, A.). New York: Vintage Books.
5. Crane, S. 1990. The Red badge of courage. New York: Dover Books. Originally published 1895.