D. N. D. Wirawan, I. A. P. Sulastri, and I. G. N. Wiantara, “The Role of Supervisor in Improving Service Quality at Lumbini Restaurant, Ubud Nyuh Bali Resort and Spa: Peranan Supervisor dalam Meningkatkan Kualitas Pelayanan di Lumbini Restaurant pada Hotel Ubud Nyuh Bali Resort and Spa”, JD, vol. 5, no. 1, pp. 289–300, Apr. 2026.