al-Sinani, S. S., M. S. Zakaria, and M. F. Mohd Sawari. “The Penalty Clauses in Leasing Contract Which Ends With Ownership (al-Ijārah Al-Muntahiyah Bi Al-Tamlīk): الشروط الجزائية في عقد الإجارة المنتهية بالتمليك”. International Journal of Fiqh and Usul Al-Fiqh Studies, vol. 3, no. 1, June 2019, pp. 6-28, doi:10.31436/ijfus.v3i1.115.