“Analisis Reaksi Pasar Modal Terhadap Berbagai Pengumuman Kasus Covid-19 Pada Fase Awal”. Journal of Business & Banking 12, no. 1 (September 20, 2022): 51–68. Accessed September 18, 2025. https://journal.perbanas.ac.id/index.php/jbb/article/view/2951.