Al-Kumayi, Sulaiman. “Konsep Sufisme ‘Shakhs-I Manevi Dan Hizmet’ Muhammad Fethullah Gülen”. Ulumuna 17, no. 2 (November 8, 2017): 359-386. Accessed January 25, 2026. https://ulumuna.or.id/index.php/ujis/article/view/241.