Dinar Aisyah Pratiwi, et al. “PENTINGNYA SURAT PERJANJIAN HUTANG PIUTANG SECARA TERTULIS”. Jurnal Pengabdian Masyarakat Indonesia (JPMI), vol. 1, no. 2, Dec. 2023, pp. 307-11, https://doi.org/10.62017/jpmi.v1i2.236.