Hanifah, S. ., Nengah Parta, I. . and Puspitasari, L. . (2023) “Application of Problem-based Learning Model to Improve Students’ Problem-solving Skills of Class VII-E SMP Negeri 25 Malang”, KnE Social Sciences, 8(10), pp. 300–309. doi: 10.18502/kss.v8i10.13455.