Daosue, J., A. Chaiworn, and S. Lertprapai. “THE CONSTRUCTION OF LEARNING ACTIVITY PACKAGE BASE ON PROBLEM BASE LEARNING FOR WORD PROBLEM SOLVING IN LINEAR EQUATION FOR MATHAYOMSUKSA 1 OF BANCHANGKARNCHANAKULWITTAYA SCHOOL”. Journal of Educational Review Faculty of Education in MCU, vol. 7, no. 3, Dec. 2020, pp. 96-106, https://so02.tci-thaijo.org/index.php/EDMCU/article/view/242975.