Sittiwong , Porntipa, and Aree Preedeekun. “The Development of Additional Course of Padoongrasdra Suksa on Social Studies Religion and Culture Strand for 4th Grade Students”. Journal of Modern Learning Development 8, no. 5 (May 30, 2023): 120–132. accessed August 28, 2026. https://so06.tci-thaijo.org/index.php/jomld/article/view/260161.