หาญพิชัย สุริยะ. 2019. “Readiness for the Promotion of Sila Thip Sub - District Administrative Organization to Be a Subdistrict Municipality in Chai Badan District, Lopburi Province”. Local Administration Journal 12 (1):129-44. https://so04.tci-thaijo.org/index.php/colakkujournals/article/view/180456.