Siritorn, Komwit. “Factors Influencing Willingness to Pay for a Municipal Waste Collection Fee in Songkhla, Thailand”. Interdisciplinary Research Review 12, no. 4 (November 23, 2017): 25–31. Accessed April 29, 2024. https://ph02.tci-thaijo.org/index.php/jtir/article/view/76484.