Widiyaningsih, E., Zaenuri, Z. and Dwijanto, D. (2020) “Problem-Solving Ability and Self-Efficacy Based On Geometry Thinking Level In Van Hiele Learning”, Unnes Journal of Mathematics Education Research, 9(2), pp. 163-169. Available at: https://journal.unnes.ac.id/sju/ujmer/article/view/33118 (Accessed: 20April2024).