Utami, Nur, Y.L. Sukestiyarno, and Isti Hidayah. “Student Problem-Solving Ability in Views of Self-Directed Learning on Problem Based Learning Assisted by Module”. Unnes Journal of Mathematics Education Research 11, no. 2 (December 30, 2022): 172-182. Accessed May 13, 2024. http://journal.unnes.ac.id/sju/ujmer/article/view/64999.