AR, Khairin, Asmin Asmin, and Dian Armanto. 2022. “Differences in Problem Solving Ability and Confidence of Students Who Get Learning Using PBL and GI Models”. Jurnal Cendekia : Jurnal Pendidikan Matematika 6 (2), 2176-90. https://doi.org/10.31004/cendekia.v6i2.1484.