โสมอินทร์ ป. Effectiveness of the Packages of the Learning Documents on the Main Duties of the Thai Citizens to Enhance Learning Achievement for the 10th Grade Students in Social Studies, Religions, and Cultures at Protpittayapayat School. Pitchayatat [Internet]. 2020 Dec. 8 [cited 2024 Apr. 19];15(3):119-28. Available from: https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/245983