Nasution N, Sitompul DR, Walhidayat W. Application of Sales Forecasting Using The Least Square Method in Web-Based Information Systems. JTOS [Internet]. 2023Jan.3 [cited 2024Dec.4];6(1):11 -22. Available from: https://ejournal.uniks.ac.id/index.php/JTOS/article/view/2580