“KEKUATAN HUKUM AKTA PERJANJIAN TANPA BEA MATERAI”. Istinbath: Jurnal Hukum 14, no. 1 (May 17, 2017): 131–147. Accessed January 29, 2026. https://e-journal.metrouniv.ac.id/istinbath/article/view/742.