Waroonroj J, Chamarat S. The Guidelines for Teacher Development on Classroom Research in Small-Sized Schools under the KhonKaen Primary Educational Service Area Office 1. dhammathas [internet]. 2018 Aug. 10 [cited 2026 Jan. 7];18(2):111-20. available from: https://so06.tci-thaijo.org/index.php/dhammathas/article/view/121975