SUDARDANA, I KETUT, and ANGGA DANU ADJIANANDA. 2021. “UPAYA ROOM SERVICE DALAM MENINGKATKAN PELAYANAN SAAT PANDEMI COVID-19 DI GRAND PURI SARON BOUTIQUE HOTEL YOGYAKARTA”. JURNAL NUSANTARA 4 (2):14-32. https://doi.org/10.63986/nsn.v4i2.34.