Simbolon, Fenny Angelina, and Abraham Ferry Rosando. “Bentuk Perlindungan Hukum Bagi Pelaku Usaha Online Dalam Retur Barang Sistem Cash On Delivery (COD)”. Innovative: Journal Of Social Science Research 3, no. 6 (December 31, 2023): 10509–10526. Accessed July 14, 2026. https://j-innovative.org/index.php/Innovative/article/view/6541.