Tobing, D. N. L. “Indihome Product Sales Forecasting With the Double Moving Average and Double Exponential Smoothing Methods on PT. Telkom Witel Sumut Pematang Siantar”. Formosa Journal of Science and Technology, vol. 1, no. 8, Dec. 2022, pp. 1201-22, doi:10.55927/fjst.v1i8.2281.