BellB. (2003). The rites of passage and outdoor education: Critical concerns for effective programming. Journal of Experiential Education, 26(1), 41–50.
2.
CatalanoR. F.BerglundM. L.RyanJ. A. M.LonczakH. S.HawkinsJ. D. (2004). Positive youth development in the United States: Research findings on evaluation of positive youth development programs. The ANNALS of the American Academy of Political and Social Science, 591(1), 98–124.