Erliananda, Dinda, and Mangaratua M. Simanjorang. 2024. “The Effect of Problem-Based Learning Model on Students’ Mathematical Problem-Solving Ability of Class VIII at SMP Negeri 35 Medan”. Jurnal Pendidikan Tambusai 8 (1):16335-47. https://doi.org/10.31004/jptam.v8i1.14706.