1. Barton, J., Griffin, & Pretty J. (2011). Exercise, nature and socially interactive based initiatives improve mood and self esteem in clinical population. Perspectives in Public Health 2. Bentley, A. (2005). Why DO students participate in collegiate outdoor programs?. Association Of Outdoor Recreation & Education Conference Proceedings, 20-31. 3. Berger, B. G. & Tobar, D. A. (2007). Physical activity and quality of life:Key considerations. In G. Tenenbaum & R. C. Eklund (Eds.),Handbook of sport psychology (3rd ed., pp. 598-620). New York 4. Chubb, M., Chubb, H.R, (1981). One Third of Our Time. An intrdoduction to Recreation Behabiors and Resources. 5. Clawson, Knetsch, J.L (1966) Economic For Outdoor Recreation. Baltimore: Johns Hopkins University Press 6. Clayne R. J., Steven P. G. (2006) Outdoor Recreation in America, 6th Edition. 7. Franklin, D.S., & Hardin (2008). Philosophical And Theorical Foundation of Campus Recreation.Campus Recreation: Essentials for the Professional 8. Gafor, A. (2007). Kejurulatihan dan sains sukan. Kuala Lumpur:Ut usan Publications & Distributors Sdn Bhd. 9. Ilhespy, I. (2009). Issues in the development of an inclusive curriculum: Listening to student voices in the evaluation of reusable learning objects in the subject areas of sport, leisure and outdoor adventure. Journal Of Hospitality, Leisure, Sport & Tourism Education (Oxford Brookes University) 10. Landers, D.M. & Arent, S.M. (2007). Physical activity and mental health. In G. Tenenbaum & R.C. Eklund (Eds.), Handbook of sport psychology (3rd ed., pp. 469-491). 11. Lindsay, J. J., & Ogle, R. A. (1972). Socioeconomic patterns of outdoor recreation use near urban areas. Journal of Leisure Research, 4(2), 19–24. 12. Kraus, R. (2001). Recreation and Leisure in Modern Society.(6th Edition)Boston, Jones and Bartlett. 13. Nash, J. B. (1965). The Philosophy of Recreation and Leisure. Dubuque, IA: Brown 14. Poff, R., Stenger-Ramsey, T., & Stuessy, T. (2005). The Current Status of Outdoor Recreation Programs in the U.S. Association Of Outdoor Recreation & Education Conference Proceedings,122-127. 15. Mahirah, (2011). Motivation for Outdoor Recreation Participation Among Undrgraduates Students in Universiti Putra Malaysia. Unpublished Bachelor Thesis, Universiti Putra Malaysia 16. Maslow, A. (1970). Motivation and Personality(2nd Edition). New York: Harper & Row 17. Nurul, H. Z. (2011). Visitors Motives For Outdoor Recreation Participation in the Malaysia Agricultural Park. Unpublished Bachelor Thesis, Universiti Putra Malaysia 18. Yahya, N. & Maruthaveeran, S. (2012). Recreation within a forest ambience - Forest Research Institute Malaysia. Australasian Parks & Leisure, 15(2), 30-31. 19. Wolfe, K. L. (2002). Investigating Seeking and Escaping Aspects of tourists’ Motivation and Specific Barriers of Travel. University of Kansa State