PERTANGGUNGJAWABAN ATAS WANPRESTASI DALAM SISTEM PRE-ORDER  MELALUI E-COMMERCE  DALAM PERSPEKTIF HUKUM PERDATA. JMA [Internet]. 2025 Sep. 16 [cited 2025 Oct. 27];3(9). Available from: https://jurnal.mediaakademik.com/index.php/jma/article/view/2799