Astutiningsih, T. et al. 2023. Optimasi Algoritme Xtreme Gradient Boosting (XGBoost) pada Harga Saham PT. United Tractors Tbk. SPECTA Journal of Technology. 7, 3 (Dec. 2023), 632–641. DOI:https://doi.org/10.35718/specta.v7i3.1031.