Agustiana, Tiara, and Yohanes Suhari. “DESIGN FORECASTING SALES ON ERAFONE ANDROID NATION PARAGON SEMARANG WITH MOVING AVERAGE METHOD AND EXPONENTIAL SMOOTHING”. Information Technology and Telematics 8, no. 2 (March 20, 2019). Accessed September 20, 2019. https://unisbank.ac.id/ojs/index.php/fti3/article/view/6505.