3Hoffman, M. L. Empathy and moral development: Implications for caring and justice [M]. Cambridge, UK: Cambridge University Press, 2000.
4Koldberg, L. The psychology of moral development: The nature and validity of moral stages (Vol. 2) [M]. New York:Harper & Row, 1984.
5Hoffman, M. L. Empathy, social cognition, and moral education [A]. In A. Garrod (Ed.), Approaches to moral development: New research and emerging themes [ C]. New York:Teachers' College, 1993, 157-179.
6Hartshome, H. & May, M. A. Studies in the natttre of character: Studies in service and self- control (Vol. 2) [M].New York: Macmillan, 1929.
7Zimbardo, P. G. The human choice: Individuation, reason,and order versus deindividuation, impulse, and chaos [ A]. In W. J. Arnold & D. Levine (Eds.), Nebraska Symposium on Motivation (Vol, 17) [C]. Lincoln: University of Nebraska Press, 1969, 237 - 307.
