Jaichuen, Nuntasorn, and กลันทปุระ อรนันท์. 2019. “The Upgrading of Tharongchang Subdistrict Administrative Organization, Phunphin, Surat Thani to Sub-district Municipality: A Study of the Opinion of People, Administrators and Staffs”. Thai Interdisciplinary and Sustainability Review 4 (1). Bangkok, Thailand:116-25. https://so03.tci-thaijo.org/index.php/JIRGS/article/view/228470.