Andriana, Myra, Irwan Sembiring, dan Kristoko Dwi Hartomo. “SOP of Information System Security on Koperasi Simpan Pinjam Using ISO/IEC 27002:2013”. Jurnal Transformatika 18, no. 1 (Juli 29, 2020): 25–35. Diakses Agustus 11, 2026. https://journals.usm.ac.id/index.php/transformatika/article/view/2020.