Nugraha, Syahrul, Yon Supraoto, and Masditou. “Analysis of Service Effectiveness on Customer Satisfaction in the Food & Beverage Bussiness in Tarutung, North Tapanuli - North Sumatra”. International Journal of Economics and Management 2, no. 02 (July 30, 2024): 151–160. Accessed April 27, 2026. https://iem.cdfpublisher.org/index.php/iem/article/view/42.