Syahputra, Norman, and Berlintina Permatasari. “IMPROVING RELATIONSHIPS TO ENHANCE CUSTOMER LOYALTY AT WARUNK BARBARKU RESTAURANT”. Journal of Management : Small and Medium Enterprises (SMEs) 18, no. 2 (July 28, 2025): 1391-1399. Accessed August 21, 2025. https://ejurnal.undana.ac.id/index.php/JEM/article/view/21135.