Mujiasih, M., B. Waluya, K. Kartono, and S. Mariani. “The Students’ Mathematics Communication Skill Performance After GeoGebra-Assisted EPIC-R Learning Implementation”. International Journal of Learning, Teaching and Educational Research, vol. 20, no. 10, Nov. 2021, https://ijlter.net/index.php/ijlter/article/view/14.