Yothicar, P., and S. Punyasiri. “THE DEVELOPMENT PROCESS OF THE LEARNING PROCESS-BASED CULTURAL TOURISM INTERPRETATION OF KHAO PHRA WIHAN NATIONAL PARK”. Phranakhon Rajabhat Research Journal : Humanities and Social Sciences, vol. 13, no. 1, Sept. 2017, pp. 42-55, https://so05.tci-thaijo.org/index.php/PNRU_JHSS/article/view/94870.