1.
Iswanto. Problem-Based Learning dalam Pembelajaran Sistem Persamaan Linear Dua Variabel. j.il.pend.bhs.sas.math. [Internet]. 2022 Dec. 18 [cited 2025 Oct. 12];8(2):1-11. Available from: https://journal.fkip-unilaki.ac.id/index.php/dia/article/view/37