MOH. BISRI. (2022). PENGGUNAAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING DALAM PENENTUAN VOLUME KERUCUT DI SMP NEGERI 21 SURABAYA. WIDYALOKA, 9(2), 228–237. Retrieved from http://jurnal.ikipwidyadarmasurabaya.ac.id/index.php/widyaloka/article/view/101