Purba, Saut, Robinson Sipahutar, and Lambas Marisi Tua LG. 2024. “PENGARUH SERVICE EXCELLENCE TERHADAP CUSTOMER DELIGHT PADA PELANGGAN DOPAMINE CAFÉ RINGROAD”. Jurnal Manajemen Dan Bisnis 24 (2):263-70. https://ejournal.ust.ac.id/index.php/JIMB_ekonomi/article/view/4039.