Trisnawati, N.F. and Sundari 2020. Efektifitas Model Problem Based Learning dan Model Group Investigation dalam Meningkatkan Karakter Anti Korupsi. Mosharafa: Jurnal Pendidikan Matematika. 9, 2 (May 2020), 203–214. DOI:https://doi.org/10.31980/mosharafa.v9i2.604.