Sari Sianturi, D. P. and Sagala, J. R. . (2020) “Prediction of 2020 Mobile Sales Trends Using the Weighted Product Method”, Journal of Intelligent Decision Support System (IDSS), 3(4), pp. 25-36. Available at: https://idss.iocspublisher.org/index.php/jidss/article/view/21 (Accessed: 5June2026).