สิทธิสาร ภ. 2018. Development of Teaching Sets Basing on Guidelines on STEM Education Integrated with the 7 Learning Steps of the Learning Cycle (7E) on the Topic of Polymer for Mathayom Suksa 4 Students. Academic Journal of Mahamakut Buddhist University Roi Et Campus. 8, 1 (Jul. 2018), 108–118.