Azmi, D. T. ., S. N. . Azzizah, and D. . Ikrimah. “Character Formation Model in Islamic Education: A Comparative Study of Hamka’s and Said Nursi’s Concept of Tazkiyatun Nafs”. Indonesian Journal of Interdisciplinary Islamic Studies (IJIIS), vol. 8, no. 2, Dec. 2025, doi:10.20885/ijiis.vol8.iss2.art6.