Pratama, Herdifa. “Validitas Akad Dalam Perjanjian Lisensi Hak Cipta Di Indonesia”. Ulumuddin: Jurnal Ilmu-ilmu Keislaman 12, no. 1 (February 7, 2022): 63-78. Accessed July 22, 2024. https://jurnal.ucy.ac.id/index.php/agama_islam/article/view/1053.