Isti, Nur, Arief Agoestanto, and Ary Kurniasih. “Analysis Critical Thinking Stage of Eighth Grade in PBL-Scaffolding Setting To Solve Mathematical Problems”. Unnes Journal of Mathematics Education 6, no. 1 (March 31, 2017): 52 - 62. Accessed November 22, 2024. https://journal.unnes.ac.id/sju/ujme/article/view/12593.