Srirangsan, Chulaporn, Rungaroon Piyarit, Prasit Kampol, Natsuda Wongboonngam, Farida Romphruek, and Teerasak Sukhsantikamol. 2022. “The Development of The King Rama IX’s Wisdom Instructional’ Social Studies Model for Sufficiency Economy as Life Philosophy”. Journal of Humanities and Social Sciences Review 24 (1):44-56. https://so05.tci-thaijo.org/index.php/hspbruacthjournal/article/view/259445.