Siphai, Sunan, Suphi Siphai, and Jaruwan Sakulku. “The development of Early Childhood intellectual Capacities in the Child Development Centers of the Local Administrative Organizations, Chaiyaphum”. International Journal of Sociologies and Anthropologies Science Reviews 3, no. 5 (September 22, 2023): 9–22. accessed April 8, 2025. https://so07.tci-thaijo.org/index.php/IJSASR/article/view/3271.