Sihombing, Denny Jean Cross. “Enhancing Service Quality And Operational Efficiency In Restaurants Through Agile-Based Vendor Management Systems”. Jurnal Ekonomi 13, no. 02 (May 6, 2024): 707–716. Accessed December 5, 2024. https://ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/4475.