Muchsin, M., Sutikno, S., & Masturi, M. (2015). BAHAN AJAR FISIKA DENGAN PENDEKATAN PROBLEM BASED LEARNING. PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL), 4, SNF2015–II. Retrieved from https://journal.unj.ac.id/unj/index.php/prosidingsnf/article/view/5003