“Practicality and Effectiveness of student™s Worksheet Based on Problem Based Learning to Practice Scientific Literacy Skill in Matter Acid and Base”. Jurnal Pendidikan Kimia 9, no. 3 (December 31, 2017): 352–355. Accessed March 22, 2026. https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/8537.