แซ่หลี สุมิตรา. “The Study of Capital Accumulation in the Past Decade of Phunphin Subdistrict Administrative Organisation, Phunphin, Suratthani”. Thai Interdisciplinary and Sustainability Review 2, no. 1 (November 16, 2019): 295–319. accessed December 6, 2025. https://so03.tci-thaijo.org/index.php/JIRGS/article/view/225504.