Waroonroj, J. and Chamarat, S. (2018) “The Guidelines for Teacher Development on Classroom Research in Small-Sized Schools under the KhonKaen Primary Educational Service Area Office 1”, Dhammathas Academic Journal, 18(2), pp. 111–120. available at: https://so06.tci-thaijo.org/index.php/dhammathas/article/view/121975 (accessed: 10 October 2026).