PENGEMBANGAN BAHAN AJAR INOVATIF RUMUS KIMIA DAN PERSAMAAN REAKSI BERBASIS MODEL PEMBELAJARAN PROBLEM BASE LEARNING (PBL). J.Pendidik.Kim [Internet]. 2015 Apr. 27 [cited 2026 Mar. 23];7(1):17-23. Available from: https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/5493