ตังนู ป. and ภิรมจิตรผ่อง เ. (2021) “A Development of an Ability in Solving the Mathematical Numbers and Numerals by Using the Four Noble Truth- Based Approach for Mattayom Suksa One Students of Benjalukpittaya School under the Secondary Educational Service Area Office 28”, Ubon Ratchathani Journal of Research and Evaluation, 3(2), pp. 48–54. available at: https://so06.tci-thaijo.org/index.php/ubonreseva/article/view/250945 (accessed: 3 October 2026).