Nainggolan, Jonner. “MODEL ANALYSIS OF THE SPREAD OF COVID-19 WITH LOGISTIC GROWTH RECRUITMENT”. BAREKENG: Jurnal Ilmu Matematika dan Terapan 17, no. 2 (June 11, 2023): 0887-0894. Accessed July 23, 2024. https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/7871.