Aufa, Yatuf, and Ida Ayu Sri Brahmayanti. “Pengaruh Variasi Menu, Persepsi Harga, Dan Promosi Terhadap Kepuasan Konsumen Pada D’Coffee Cup Gunung Anyar Surabaya”. RIGGS: Journal of Artificial Intelligence and Digital Business 4, no. 4 (January 2, 2026): 8353–8363. Accessed June 5, 2026. https://journal.ilmudata.co.id/index.php/RIGGS/article/view/4777.