Implementasi Akad Wakalah bil Ujrah, Jual Beli, dan Perlindungan Merek UMKM Nagori Bangun Simalungun. KDRKM [Internet]. 2026 Sep. 17 [cited 2026 Sep. 21];7(2):228-3. Available from: https://journals.usm.ac.id/index.php/kdrkm/article/view/16075