SUDARDANA IK, DANU ADJIANANDA A. UPAYA ROOM SERVICE DALAM MENINGKATKAN PELAYANAN SAAT PANDEMI COVID-19 DI GRAND PURI SARON BOUTIQUE HOTEL YOGYAKARTA . NUSANTARA [Internet]. 2021 Aug. 25 [cited 2024 Dec. 22];4(2):14-32. Available from: https://jurnal.akparda.ac.id/index.php/nusantara/article/view/34