Inmanee, Pradapchai, Thitiya Bongkotphet, and Sirinapa Kijkuakul. “Teachers’ Perceptions of Pedagogical Content Knowledge for STEM: A Case Study of a Secondary School in Phitsanulok”. Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University 19, no. 2 (December 21, 2025): 489–502. accessed October 1, 2026. https://so01.tci-thaijo.org/index.php/GraduatePSRU/article/view/281379.