Dutthuyawat A. Guidelines for developing problem-solving processes in the learning of teacher students, Sakon Nakhon Rajabhat University. JMHR [internet]. 2024 Jun. 29 [cited 2026 Sep. 28];8(2):296-311. available from: https://so04.tci-thaijo.org/index.php/JMHR/article/view/a-020