Firiana A, Saputri T, Authar N, Afandi MD. Research Trends in Problem-Based Learning: A Narrative Review of Studies on Students’ Engagement. RIGGS [Internet]. 2026 May 12 [cited 2026 May 22];5(2):2325-32. Available from: https://journal.ilmudata.co.id/index.php/RIGGS/article/view/8748