1.
Umatin C. APLIKASI PROBLEM BASED LEARNING DAN GROUP INVESTIGATION DALAM PEMBELAJARAN EKONOMI DI MAN MALANG I. konstruk [Internet]. 2017Jan.14 [cited 2024May3];9(1):135 -146. Available from: https://ejournal.unisbablitar.ac.id/index.php/konstruktivisme/article/view/160