Garba, M. M., M. A. Mohamed Adnan, and M. A. Zailani. “Assessment of the Critical Period Hypothesis Among Adult Fulbe Adamawa in the Traditional Way of Learning the Glorious Quran”. Jurnal Usuluddin, vol. 51, no. 2, Dec. 2023, pp. 63-88, doi:10.22452/usuluddin.vol51no2.3.