Yunitiara Rizqi, H., S. B. Waluya, and W. Wiyanto. “Mathematics Communication Skill Viewed from Self-Confidence in Auditory Intellectually Repetition (AIR) Learning Model With RME Approach”. Unnes Journal of Mathematics Education Research, Vol. 10, no. A, June 2020, pp. 162-7, https://journal.unnes.ac.id/sju/ujmer/article/view/36813.