Sittiwong P, Preedeekun A. The Development of Additional Course of Padoongrasdra Suksa on Social Studies Religion and Culture Strand for 4th Grade Students. jomld [internet]. 2023 May 30 [cited 2026 Aug. 28];8(5):120-32. available from: https://so06.tci-thaijo.org/index.php/jomld/article/view/260161