Hardi, Ilham, and Muhadjir Anwar. “Optimasi Proses Sales Invoice Melalui Implementasi Software Di PT Swabina Gatra Travel”. Jurnal Pelayanan Dan Pengabdian Masyarakat Indonesia, vol. 2, no. 4, Nov. 2023, pp. 117-24, doi:10.55606/jppmi.v2i4.776.