Junjumnong, Natchana, Sudaporn Pongpisanu, and Weena Sumbandit. “Results of Early Childhood Activities with a STEM Education Model in Conjunction with Sufficiency Economy for Developing Intellectual Skills”. Saengtham College Journal 18, no. 1 (June 30, 2026): 26–40. accessed September 3, 2026. https://so01.tci-thaijo.org/index.php/scj/article/view/272848.