1.
Chanprom P, Khum–un S, Jirachotdaecho G. Examining the Ability to Solve Mathematical Problems of First–Year Secondary School Students through Polya’s Problem–Solving Process. rpujournal [Internet]. 2022 Apr. 25 [cited 2024 May 17];8(1):327-43. Available from: https://so03.tci-thaijo.org/index.php/rpu/article/view/260281