Zainuddin, Zainuddin, dan Rahmat Ramadhani. “The Legal Force of Electronic Signatures in Online Mortgage Registration”. Jurnal Penelitian Hukum De Jure 21, no. 2 (Juni 24, 2021): 243–252. Diakses November 6, 2026. https://lawpolicyjournal.id/index.php/dejure/article/view/1739.