Siako, Yulianti, and Kasmudin Mustapa. 2020. “Effectiveness of Problem Solving Learning Model towards Student Learning Outcomes on Acid-Base Solution in SMA Negeri 1 Buko on Academic Year 2018-2019”. Jurnal Akademika Kimia 9 (3). Palu, Sulawesi Tengah - INDONESIA:162-67. https://doi.org/10.22487/j24775185.2020.v9.i3.pp162-167.