Nasution, Nurliana, Dadang Rukmana Sitompul, and Walhidayat Walhidayat. “Application of Sales Forecasting Using The Least Square Method in Web-Based Information Systems”. JURNAL TEKNOLOGI DAN OPEN SOURCE 6, no. 1 (January 3, 2023): 11 - 22. Accessed March 2, 2025. https://ejournal.uniks.ac.id/index.php/JTOS/article/view/2580.