“APLIKASI PENJUALAN ONLINE SPARE PART MESIN ALAT BERAT DI PT. BUDI JAYA AGUNG”. AL ULUM: JURNAL SAINS DAN TEKNOLOGI, vol. 3, no. 2, June 2018, pp. 82-89, https://doi.org/10.31602/ajst.v3i2.1297.