Kamnuansilpa, Peerasit, and Parnchit Jinhirun. 2015. “Tourism and Solid Waste Management on Koh Pha-Ngan: An Exploratory Study”. Journal of Humanities and Social Sciences (HUSOKKU) 32 (1):165-88. https://so01.tci-thaijo.org/index.php/HUSO/article/view/51695.