1. Antonio, A. L. (2001). Diversity and the influence of friendship groups in college. Review of Higher Education,
25(1), 63–89.
2. Association of American Colleges and Universities. (2012). Core commitments: Educating students for personal and social responsibility. Retrieved June 1, 2012, from
http://www.aacu.org/core_commitments/index.cfm
.
3. Astin, A. W. (1993). What matters in college: Four critical years revisited. San Francisco: Jossey-Bass.
4. Astin, A. W. (1996). Involvement in learning revisited: Lessons we have learned. Journal of College Student Development,
36, 123–134.
5. Astin, A., Vogelgesang, L. J., Ikeda, E. K., & Yee, J. A. (2002). How service learning affects students: Executive summary. Los Angeles: Service Learning Clearing Project, Higher Education Research Institute.