H. Saputro and D. Mahendra, “Penerapan Aplikasi Penjualan Online Berbasis Customer Relationship Management (CRM) pada Toko Sumber Mulyo di Kabupaten Kudus,” J. Disprotek, vol. 10, no. 1, pp. 35–42, doi: 10.34001/jdpt.v10i1.869, 2019.