Jakae, Ogama, Prasong Tanpichai, and Apichart Jai-aree. 2018. “Construction of Social Space in Thai Hill Tribe Ethnic Groups in Kamphaeng Phet Province”. Kasetsart Journal of Social Sciences 41 (2):329–335. https://so04.tci-thaijo.org/index.php/kjss/article/view/232598.