Kanha, Tiwawan. 2020. “SUSTAINABLE TOURISM DEVELOPMENT GUIDELINES: A CASE STUDY OF HUAI YA KHRUEA COMMUNITY, NAMNAO DISTRICT, PHETCHABUN PROVINCE”. Valaya Alongkorn Review 10 (3):100-111. https://so06.tci-thaijo.org/index.php/var/article/view/244521.