NURUL MUFIDA, SHOBRINA, and WORO SETYARSIH. “KTERLAKSANAAN MODEL PROBLEM BASED LAERNING UNTUK MELATIHKAN PHYSICS PROBLEM SOLVING ABILITY”. Inovasi Pendidikan Fisika, vol. 8, no. 3, July 2019, https://ejournal.unesa.ac.id/index.php/inovasi-pendidikan-fisika/article/view/29758.