Hanifah, U., & Sumarman, S. (2014). Peranan Guest Relation Officer (GRO) Dalam Menangani Keluhan Tamu di Hotel Royal Ambarrukmo Yogyakarta. Jurnal Pariwisata Indonesia, 9(2), 60–81. Retrieved from http://jurnal.stpsahidsurakarta.ac.id/index.php/JPI/article/view/182