Nurul Permatasari, F., B. Purnomo, and D. . Asmara. “Kajian Tentang Pengaruh Guest Comment Terhadap Perubahan KebijakanBanquet Manager Di Hotel Grand Keisha Yogyakarta”. Jurnal Pariwisata Indonesia, vol. 15, no. 2, Dec. 2020, pp. 39-49, http://jurnal.stpsahidsurakarta.ac.id/index.php/JPI/article/view/167.