“PENERAPAN MODEL GARCH (GENERALIZED AUTOREGRESSIVE CONDITIONAL HETEROSCEDASTICITY) DALAM MENGHITUNG NILAI BETA SAHAM INDEKS PEFINDO25”. Jurnal Ilmiah Sains 18, no. 2 (July 31, 2018): 67–74. Accessed October 29, 2026. https://ejournal.unsrat.ac.id/v3/index.php/JIS/article/view/19732.