Lubis, Z.A., Siregar, O.O. and Nasution, A. 2025. Madrasah as the Central Educational Institutions during the Abbasid Era. Ahlussunnah: Journal of Islamic Education. 4, 3 (Dec. 2025), 754–762. DOI:https://doi.org/10.58485/jie.v4i3.539.