เพชรนิล ยิ่งศักดิ์. “The Guideline Development of Innovative Teaching Materials for Citizenship Development”. CRRU Law, Political Science and Social Science Journal 1, no. 2 (July 1, 2017): 19–33. Accessed March 28, 2024. https://so06.tci-thaijo.org/index.php/lawcrru/article/view/173657.