สุวรรณรงค์ เ., สุขมาตย์ อ. and พิมดี ไ. 2015. 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. 14, 3 (Dec. 2015), 77–84.