NINGRUM, Rizky Kusuma. Sampul Depan. Warta Pengabdian, [S.l.], v. 13, n. 3, july 2020. ISSN 2655-7509. Available at: <https://jurnal.unej.ac.id/index.php/WRTP/article/view/18836>. Date accessed: 17 jan. 2021. doi: https://doi.org/10.19184/wrtp.v13i3.18836.