NINGRUM, Rizky Kusuma. Sampul Depan. Warta Pengabdian, [S.l.], v. 14, n. 2, june 2020. ISSN 2655-7509. Available at: <https://jurnal.unej.ac.id/index.php/WRTP/article/view/18176>. Date accessed: 25 jan. 2021. doi: https://doi.org/10.19184/wrtp.v14i2.18176.