F. M. Setiadi, I. Daulay, N. Balqis, and F. E. Elassali, “Anaphoric Stylistics of Sūrat Ar-Raḥmān [55]: Gorys Keraf’s Framework on Repetition”, al-ittijah, vol. 18, no. 1, pp. 57–72, Jun. 2026.