Sufaidah, Siti, and Muhammad Fadil Zulfikar. “Chat-Based Digital Marketing To Increase Customer Loyalty”. NEWTON: Networking and Information Technology 2, no. 1 (June 2, 2022): 1–6. Accessed November 21, 2024. https://ejournal.unwaha.ac.id/index.php/newton/article/view/1412.