maimun, Tuti Zakiyah, and Arya Samudra Mahardhika. 2021. “Effectiveness of Islamic Bank Earning: Paramatic Stochastic Frontier Approaches”. Agregat: Jurnal Ekonomi Dan Bisnis 5 (1):113-27. https://journal.uhamka.ac.id/index.php/agregat/article/view/6543.