Muchsin, Muchsin, Sutikno Sutikno, and Masturi Masturi. 2015. “BAHAN AJAR FISIKA DENGAN PENDEKATAN PROBLEM BASED LEARNING”. PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) 4 (October), SNF2015-II. https://journal.unj.ac.id/unj/index.php/prosidingsnf/article/view/5003.