Santosa, B., Nurhayati, & Hidayatullah, N. (2023). 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(3). https://doi.org/10.56107/penanomics.v2i3.149