Siallagan, Samuel, 		Waruwu, Ingati, 		Marbun, Jaminuddin, AND 		Silaban, Rudolf.
" ASPEK PERJANJIAN JUAL BELI MELALUI INTERNET DI KAJI MENURUT HUKUM PERJANJIAN" <em>DIKTUM</em> [Online], Volume 1 Number 1 (31 December 2022)