Widiastuti, Ririn, Kartono Kartono, and Scolastika Mariani. “Geometry Thinking Ability and Self Efficacy in Problem Based Learning Geogebra Assisted With Self Assessment”. Unnes Journal of Mathematics Education Research 10, no. A (January 14, 2021): 17-29. Accessed May 2, 2024. https://journal.unnes.ac.id/sju/ujmer/article/view/44046.