Punyaroj, Junpen. 2020. “THE DEVELOPMENT OF LEARNING MODEL TO ENHANCE PRATHOMSUKSA FIVE STUDENT’S PROBLEM SOLVING ABILITY FOCUSING ON KWAN PHAYAO RESERVATION IN THE SOCIAL STUDIES, RELIGION AND CULTURE LEARNING AREAS”. Journal of MCU Social Science Review 9 (3). Ayutthaya, Thailand:159-72. https://so03.tci-thaijo.org/index.php/jssr/article/view/244983.