“The Effect of Using the Buffer Solution Material Module on the Learning Outcomes of Class XI Science Students at MAS PSA Sulit Air”. Entalpi Pendidikan Kimia 4, no. 2 (June 23, 2023): 24–30. Accessed November 4, 2026. http://entalpipendidikan.ppj.unp.ac.id/index.php/epk/article/view/309.