الخوالدة س. (2016) “محمد إقبال والقلق الصوفي: Sufi Muhammad Iqbal and Anxiety”, Al-Fikr al-islāmī al-muʿāṣir (previously Islamiyat al-Ma’rifah), 21(84), pp. 222–193. doi: 10.35632/citj.v21i84.619.