1. Astin & Sax. (1998). How Undergraduates Are Affected By Service Participation. Journal of College Student Development, 39: 251-263.
2. Cnaan, R. A., Handy, F. Wadsworth, M. (1996). Defining Who Is A Volunteer: Conceptual and Empirical Considerations, Nonprofit and Voluntary. Sector Quarterly 3: 364–383.
3. Chua Yan Piaw. (2006). Kaedah dan Statistik Penyelidikan: Kaedah Pendidikan. Kuala Lumpur: McGraw Hill.
4. Clary, E. G., Snyder, M., & Stukas (1996). Volunteers Motivations. Nonprofit and Voluntary Sector Quarterly 25: 485–505.
5. Ekerdt, D.J. (1986). The Busy Ethic: Moral Continuity Between Work and Retirement. The Journal of Higher Gerontologist, 3: 239-44.
6. Ellis, S. J (1996). The Executive Role in Volunteer Program Success. International Journal of Offender Therapy and Comparative Criminology, 26: 215-240.
7. Finkelstein, M. A., & Brannick, M. T. (2007). Applying theories of institutional helping to informal volunteering: Motives, role identity and prosocial personality. Social Behavior and Personality, 35, 101-114.
8. Gray (2000). The Benefits Of Community Service For Students. Change 2: 30-40. Jago, L., Deery (2002). An Investigation of Volunteer Use in Tourism Organizations. International Journal of Contemporary Hospitality Management, 5: 229-236.
9. Haski-Leventhal, D., Cnaan, R., Handy, F., Brudney, J. L., Holmes, K., & Hustinx, L., (2008). Students’ vocational choices and voluntary action: A 12 nation study. Vol.19(1), 1-21.
10. Hutchison, S (2003). Group Processes and Volunteering: Enhancing Recruitment and Retention. Administration in Social Work 33: 23-33.
11. Kendall, J. C., & Associates. (1990). Combining Service and Learning: A Resource Book for Community and Public Service. National Society for Internships and Experiential Education.
12. Knauft, D (1992). Predicting the Retention of University Students. Research in Higher Education 10: 35-37.
13. Kemp, S. (2002). Volunteers Learning in the Olympics. Journal of European Industrial Training, 26: 109-116.
14. Mabry, J.B. (1998). Pedagogical variations in service-learning and student outcomes: How time, contact and reflection matter. Michigan Journal of Community Service Learning, 5(1), 32-47.
15. Malhotra, N.K., Hall, J., Sham, M & Crsip, M. (1996). Marketing Research: Applied Orientation (1st Edition). Sydney: Prentice Hall.
16. McDonnell, I., Allen, J. & O’Toole, W. (1999). Festival and special event management. Brisbane: John Wiley & Sons Australia, Ltd.
17. Mellor, Hayashi, Stokes. (2009). Volunteering and Its Relationship with Personal And Neighborhood Well-Being, Nonprofit And Voluntary. Sector Quarterly: 144–159.
18. Musick, Marc, and John Wilson. (2008). Volunteers: A Social Profile. Indianapolis: Indiana University Press.
19. Musick, M. and Wilson J. (2003) “Volunteering and Depression: The Role of Psychological and Social Resources in Different Age Groups.” Social Science and Medicine, 56(2): 259-269.
20. Nichols, G, King. (1999). Redefining the Recruitment Niche for the Guide Association In The UK. Leisure Sciences. 21: 307-320.
21. Shweiki & Mauck. (1993). Volunteering In Cross-National Perspective: Initial Comparisons. Civil Society Working Paper 10. London: London School Of Economics, Centre For Civil Society.