Muangsong , N. ., & Doungwilai, D. . (2024). THE DEVELOPMENT OF PROBLEM-SOLVING SKILLS AND CREATIVE WRITING SKILLS OF GRADE 5 STUDENTS USING PROBLEM-BASED LEARNING AND FLIPPED CLASSROOM . Journal of Liberal Art of Rajamangala University of Technology Suvarnabhumi, 6(3), 772–786. retrieved from https://so03.tci-thaijo.org/index.php/art/article/view/278606