Darmo, Budi. “PENGARUH PROBLEM BASE LEARNING (PBL) DAN SIKAP ILMIAH TERHADAP HASIL BELAJAR FISIKA SISWA SMA”. PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL), vol. 3, Oct. 2014, pp. 239-42, https://journal.unj.ac.id/unj/index.php/prosidingsnf/article/view/5514.