Muhammad, Helmi. “Islamic Spiritual Leadership: Implementation and Its Influence On Bank Syariah Indonesia”. Ad-Deenar: Jurnal Ekonomi dan Bisnis Islam 7, no. 01 (March 30, 2023). Accessed June 18, 2025. https://jurnal.staialhidayahbogor.ac.id/index.php/ad/article/view/3983.