prasertpong, S., and T. Laosuwan. “The development of activities using Problem-Based Learning (PBL) in the production of goods services and consumer protection of Mathayomsuksa 2 Students”. Journal for Developing the Social and Community, vol. 10, no. 3, Dec. 2023, pp. 407-24, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/272008.