Ginting, Herti, and Anggi Novika sari. “The Role Of The Staff In Improving Work Operations At The Coffee Shop To Increase Guest Satisfaction At Garuda Plaza Medan Hotel”. Enrichment : Journal of Management 11, no. 2 (May 31, 2021): 559-569. Accessed April 20, 2026. https://enrichment.iocspublisher.org/index.php/enrichment/article/view/229.