Phinla, W. ., W. . Phinla, and N. . Mahapoonyanont. “An Integrated Social Studies Teaching Model Based on Problem-Based and Community-Based Learning to Foster 21st Century Competencies in Small Primary Schools”. International Journal of Innovative Research and Scientific Studies, vol. 8, no. 3, Apr. 2025, pp. 509-18, doi:10.53894/ijirss.v8i3.6555.