สิทธิสารภ. 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, v. 8, n. 1, p. 108-118, 23 jul. 2018.