Saranontawat, K., Kortana, T., & Pungnirund, B. (2020). Model of Sustainability Enhancement According to the Concepts of Sufficiency Economy from the Sufficiency Economy Learning Center in Thailand. Research and Development Journal Suan Sunandha Rajabhat University, 12(1). สืบค้น จาก https://so05.tci-thaijo.org/index.php/irdssru/article/view/243993