สุวรรณรงค์ เ., สุขมาตย์ อ., and พิมดี ไ. “The Development of Instructional Packages for Reinforce The System Thinking With Cooperative and Problem-Based Learning for Mathayomsuksa 5 at Bodindecha (Sing Singhaseni) School”. Journal of Industrial Education, vol. 14, no. 3, Dec. 2015, pp. 77-84, https://ph01.tci-thaijo.org/index.php/JIE/article/view/122303.