Alda, M., F. H. . Sibarani, and A. . Nasution. “Validation Information System Munaqasyah Exam Registration Based Android”. Sinkron : Jurnal Dan Penelitian Teknik Informatika, vol. 6, no. 4, Oct. 2022, pp. 2280-91, doi:10.33395/sinkron.v7i4.11737.