Iskandar, Abubakar, et al. “Penetration Analysis of Covid 19 and Impact on the Existence of Social Economic Life Citizenn in Bogor City (Study in Disaster Perspective)”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 62, no. 2, May 2022, pp. 68-81, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/14034.