Puspitasari E, Kartono K, Junaedi I. Mathematical Spatial Ability Reviewed from Students’ Self-Confidence in the PBL Model with Teacher and Peer feedbacks Assisted by Geogebra. UJMER [Internet]. 17May2020 [cited 21Dec.2024];10(A):62-9. Available from: https://journal.unnes.ac.id/sju/ujmer/article/view/38708