Kaewkongpan, Duangjan, Weeranuch Karuehanon, and Chisapath Choothong. “Outcomes of an Outdoor STEM Education Camp Based on the PTRU Teacher Development Model for General Science Students at Lampang Rajabhat University”. Journal of Education Rajabhat Maha Sarakham University 22, no. 3 (December 30, 2025): 297–312. accessed September 11, 2026. https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/286808.