Rahmawati, C., and J. Saptia Kurnia. “AAnalysis of the Impact of the Covid 19 Pandemic on Distance Learning at Universitas Dirgantara Marsekal Suryadarma”. Jurnal Mantik, vol. 5, no. 4, Feb. 2022, pp. 2400-9, https://www.iocscience.org/ejournal/index.php/mantik/article/view/1986.