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, vol. 3, no. 6, Dec. 2023, pp. 10509-26, https://j-innovative.org/index.php/Innovative/article/view/6541.