Noviastuti, N., and I. . WAHYU ASTUTI. “USAHA FOOD AND BEVERAGE PRODUCT DALAM MENINGKATKAN REVENUE DI GRAND PURI SARON BOUTIQUE HOTEL YOGYAKARTA”. JURNAL NUSANTARA, vol. 4, no. 1, Feb. 2021, pp. 27-35, https://jurnal.akparda.ac.id/index.php/nusantara/article/view/45.