Puspitasari, Elsa, Kartono Kartono, and Iwan Junaedi. “Mathematical Spatial Ability Reviewed from Students’ Self-Confidence in the PBL Model With Teacher and Peer Feedbacks Assisted by Geogebra”. Unnes Journal of Mathematics Education Research 10, no. A (May 17, 2020): 62-69. Accessed December 21, 2024. https://journal.unnes.ac.id/sju/ujmer/article/view/38708.