Riyanto, Riyanto, Mustar Aman, Beby Tiara, Nuri Wiyono, and Yunianto Nugroho. “Development of Coronavirus Disease Patient Registration Information System With Object Oriented System Approach”. Journal of Information Systems and Informatics 3, no. 4 (December 28, 2021): 724-739. Accessed February 4, 2026. https://journal-isi.org.adsii.or.id/index.php/isi/article/view/195.