Phomsut, Suttinan, Siraprapa Phruttikul, and Chaweng Sonboon. “State and Problems in Learning Management Competency of Preschool Teachers in the Child Development Centers under the Local Administrative Organization Muang District, Chonburi”. Interdisciplinary Academic and Research Journal 3, no. 6 (December 6, 2023): 861–878. accessed December 9, 2025. https://so03.tci-thaijo.org/index.php/IARJ/article/view/272346.