Rahma, Dina, et al. “Application Of Problem Based Learning (PBL) Model To Improve Student Learning Outcomes On Acid Base Titration Material For Class XI SMA Negeri 5 Palu”. 2025. Media Eksakta, vol. 19, no. 2, Oct. 2025, pp. 137-41, doi:10.22487/me.v19i2.1153.