Elisa Br Tarigan, Dewi Shinta Wulandari Lubis. Improving The Professionalism Of Waiter And Waitress In Supporting The Succesaful Operational Food And Beverage Service At Aryaduta Hotel Medan . Jurnal Ekonomi [Internet]. 2024 Jul. 23 [cited 2024 Dec. 5];13(03):336-45. Available from: https://ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/4815