References
- Hartshorne , H. and May , M. A. 1928-1930 . Studies in the nature of character: Volume 1—Studies in deceit; Volume 2—Studies in self-control; Volume 3—Studies in the organization of character , New York : Macmillan .
- Lickona , T. , ed. 1976 . Moral development and behavior. Theory, research and social issues , New York : Holt, Rinehart & Winston .
- Medinnus , G. R. 1957 . An Investigation of Piaget's concept of the development of moral judgment in six to twelve year olds , University of Minnesota . Unpublished doctoral dissertation
- Piaget , J. 1948 . The moral judgment of the child , Glencoe, IL : Free Press . (Original work published 1932)
- Rappoport , A. 1964 . Strategy and conscience , New York : Harper & Row . (1970)