4Wilson J. Volunteering [J]. Annual Review of Sociology, 2000, Vol.26 : 215-240.
5Penner L.A. Dispositional and organizational influences on sustained volunteerism : an interactionist perspective [J ]. Journal of Social Issues, 2002, Vol.58 (3): 447-467.
6Omoto A.M, Snyder M. Sustained helping without obligation: Motivation, longevity of service, and perceived attitude change among AIDS volunteers [J ]. Journal of Personality and Social Psychology, 1995,Vol. 68- 671-686.
7Frisch M.B, Gerrard M. Natural helping systems: Red-cross volunteers [J ]. American Journal of Community Psychology, 1981, Vol.9: 567-579.
8Cnaan R.A, Goldberg-Glen R.S. Measuring motivation to volunteer in human services [J ]. Journal of Applied Behavioral Science, 1991, Vol.27:269-284.
9Clary E.G, Snyder M, Ridge R.D, Copeland J, Stukas A.A, Haugen J, Miene P. Understanding and assessing the motivations of volunteers: a functional approach[J]. Journal of Personality and Social Psychology, 1998, Vol. 74(6): 1516-1530.
10Tschirhart M, Mesch D.J, Perry J.L, Miller T.K, Lee G. Stipended volunteers: their goals, experiences, satisfaction, and likelihood of future service[J]. Nonprofit and Voluntary Sector Quarterly, 2001 ,Vol.30: 422-443.