Nugraha, Risris Hari, et al. “The Urgency of Tazkiyatu an-Niyah in Learning Activities: A Qualitative Study of Az-Zarnuji’s Thoughts in Ta‘lim Al-Muta‘allim”. Jurnal Kawakib, vol. 6, no. 2, Dec. 2025, pp. 259-80, doi:10.24036/kwkib.v6i2.335.