Muhammad Habib Ash Shiddiqi, D. . Purwaningsih, and E. . Pujiana. “Research Trends in the Application of Problem Based Learning Model in Chemistry Learning in Indonesia: A Systematic Literature Review”. IJCER (International Journal of Chemistry Education Research), vol. 9, no. 1, Apr. 2025, pp. 74-83, doi:10.20885/ijcer.vol9.iss1.art8.