1. Bhuntarikaviwat, T. (1995, October 22). Buddhadasa Bhikku: Dhammiksangkom and nature (1). Krungthep TurakitNewspaper, p. 7. (In Thai).
2. Chabhudbhuntarik, V. (1992). Buddhism. Bangkok: O.S. Printing House. (In Thai).
3. Chamratpun et al., Chamratpun, V., Yongwanich, S., Kunurat, P. & Kaisang, D. (n.d). Phu Ta forest: A case study of Ban Whan, Tumbol Whan Kum, Amphur Rasi Salai, Sri Sa Ket. Khon Kaen: Faculty of Humanities, Social Science, Khon Kaen University, Thailand, (In, Thai)., in, press.,
4. Chetchotiros, Chetchotiros, N. (1996, March 26). Abbot teaches peace and conservation in a materialist era. Bangkok Post Newspaper, p. 20.
5. Cremo, M.A. & Goswami, M. (1995) Divine nature: A spiritual perspective on the environmental crisis, Sydney: Bhaktivedanta Book Trust International.