Santosa, Budi, Nurhayati, and Nur Hidayatullah. “Efficiency Analysis of Bank Buku 4 (Bank With Core Capital at Least Rp30 Trillion) Before and During The Covid-19 Pandemic: Efficiency Analysis of Bank Buku 4 (Bank With Core Capital at Least Rp30 Trillion) Before and During The Covid-19 Pandemic”. PENANOMICS: International Journal of Economics 2, no. 3 (December 11, 2023). Accessed April 20, 2025. https://penajournal.com/index.php/PENANOMICS/article/view/149.