PONGWAT, P. Guidelines to Promote Internal Quality Assurance of Early Childhood Development Centers under Sub-District Administrative Organization of Ratchaburi Province. VOICES AND VISIONS: Journal of Humanities and Social Sciences, [S. l.], v. 1, n. 1, p. 17–31, 2018. DOI: 10.53848/vvjournal.v1i1.2192. Disponível em: https://so14.tci-thaijo.org/index.php/VandVJournal/article/view/2192. Acesso em: 1 oct. 2026.