AllenK. (1982). Americans volunteer, 1981: A Gallup survey on volunteering. Voluntary Action Leadership, pp. 21–33
2.
BastonC.C., & CokeJ.S. (1981). Empathy: A source of altruistic motivation for helping?Altruism and helping behavior, pp. 167–168.
3.
Carnegie Foundation for the Advancement of Teaching (1984). Carnegie survey of undergraduates.Washington, DC: Author.
4.
FitchT.R. (1987). Characteristics and motivations of college students volunteering for community services. Jounal of College Student Personnel, 28(5), pp. 424–430.
5.
HainesM. (1977). Volunteers: How to find them … How to keep them!., British Columbia: Canadian Secretary of State.
6.
KrausR.G. (1975). Recreational leadership and supervision: Guidelines for professional development.W.B. Saunders Company, pp. 333–344.
7.
PhillipsM. (1982). Motivation and expectation in successful volunteerism. Journal of Voluntary Action Research.11, pp. 118–125.
8.
WhiteR. (1981). Humanities concern. The modern American college.San Francisco: Jossey-Bass, pp. 158–171.