Saensanit, S., Witcharapote, J. and Tiamvong, V. (2026) “The Development of Problem-Solving Skills and Academic Achievement of Students in Grade 5 on Economics By Organizing Learning Using Problem-Based Learning (PBL)”, Journal of Graduate MCU KhonKaen Campus, 13(2), pp. 281–296. available at: https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/282579 (accessed: 28 September 2026).