MOH. BISRI. PENGGUNAAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING DALAM PENENTUAN VOLUME KERUCUT DI SMP NEGERI 21 SURABAYA. WIDYALOKA [Internet]. 2022 Jul. 29 [cited 2026 Aug. 19];9(2):228-37. Available from: http://jurnal.ikipwidyadarmasurabaya.ac.id/index.php/widyaloka/article/view/101