Situmorang, Samuel. “Syarat Sahnya Suatu Jual-Beli Online Pada Perjanjian/ Kontrak Elektronik Di Indonesia ”. Visi Sosial Humaniora 3, no. 2 (December 28, 2022): 170-188. Accessed July 3, 2024. https://ejournal.uhn.ac.id/index.php/humaniora/article/view/1115.