Analisis Manajemen Kas Negara Masa Khulafaur Rasyidin Dan Sentralisasi Birokrasi Keuangan Masa Dinasti Abbasiyah: Analysis of State Cash Management in the Era of Guided Caliphate and the Centralization of Financial Bureaucracy in the Abbasid Dynasty. JEIZA 2026, 2 (2), 54-68.