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2. Boyer, E. L. (1990). Scholarship reconsidered: Priorities of the professoriate. Princeton, NJ: Carnegie Foundation for the Advancement of Teaching.
3. Chronicle of Higher Education;EL Boyer,1994
4. Carnegie Corporation of New York. (1995). Great transitions: Preparing adolescents for a new century. New York: Carnegie Corporation of New York.
5. Dryfoos, J. G. (1990). Adolescents at risk: Prevalence and prevention. New York: Oxford University Press.