Pramono, Cinditia, Titik Akiriningsih, and Agus Gunawan. “Pengaruh Strategi Marketing Mix 4P Terhadap Tingkat Penjualan Kamar Di Hotel Grand Keisha by Horison Yogyakarta”. Jurnal Pariwisata Indonesia 15, no. 1 (July 1, 2019): 73–83. Accessed December 18, 2024. http://jurnal.stpsahidsurakarta.ac.id/index.php/JPI/article/view/148.