พรมมาศ ส., ศิริเกษ บ. and คำมา ภ. (2016) “The States and Problems Related to the Administration of Small-sized Schools under the Loei Primary Education Service Area Office 2”, Journal of Roi Et Rajabhat University, 10(2), pp. 137–142. available at: https://so03.tci-thaijo.org/index.php/reru/article/view/176500 (accessed: 29 August 2026).