Nurhayati, Neneng, and Sylvia Balfas. 2021. “STRATEGI MARKETING GRAND PURI SARON BOUTIQUE HOTEL YOGYAKARTA DALAM MEMPERTAHANKAN HUNIAN KAMAR DI MASA PANDEMI COVID 19”. JURNAL NUSANTARA 4 (2):44-49. https://jurnal.akparda.ac.id/index.php/nusantara/article/view/36.