Rudy Purwanto, S.Si, M.Pd., Dra Nurhayati, Rizki Uni Utami, S.Pd, Gr. 2022. “SB2 COLLA METHOD : APPLICATION OF PROBLEM BASED LEARNING MODEL TO IMPROVE STUDENT LITERATURE”. Jurnal Pendidikan Dompet Dhuafa 12 (01), 29-36. https://ojs.pendidikandd.org/index.php/JPD/article/view/284.