1. Allen, R., Dubin, H. N., Pilnick, S., & Youtz, A. C. (1970). Collegefields: From delinquency to freedom. Seattle, WA: Special Child Publications.
2. Moral reasoning of students in different cultural, social, and educational settings;Bar-Yam;American Journal of Education,1980
3. Divergence in moral reasoning about sport and life;Bredemeier;Sociology of Sport Journal,1984
4. Divergence in children's moral reasoning about issues in daily life and sport specific contexts;Bredemeier;International Journal of Sport Psychology,1995
5. Bull, N. J. (1969). Moral education. London: Routledge & Kegan Paul.