Hariadi, W., and S. Sulantari. “Aplication of ARIMA Model for Forecasting Additional Positive Cases of Covid-19 in Jember Regency”. Enthusiastic : International Journal of Applied Statistics and Data Science, vol. 1, no. 1, Apr. 2021, pp. 20-27, doi:10.20885/enthusiastic.vol1.iss1.art4.