Mulyani, Sri, and Dwi Hartini. “ANALISIS KEPUASAN PENUMPANG PEMEGANG KARTU GARUDA FREQUENT FLYER (GFF) PLATINUM (DI BANDAR UDARA INTERNASIOAL ADISUTJIPTO YOGYAKARTA)”. ReTII00 (January 17, 2017). Accessed May 4, 2024. //journal.itny.ac.id/index.php/ReTII/article/view/383.