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Nirwana, Bayu Wahyu and Al Faritsy, Ari Zaqi (2024) ANALISIS PENINGKATAN KUALITAS LAYANAN JASA DENGAN METODE SERVQUAL (SERVICE QUALITY) DAN TRIZ (THEORIYA RESHENIYA IZOBREATATELSKIKH ZADATCH) (STUDI KASUS LAVA TOUR MJAK JEEP MERAPI). Tugas Akhir thesis, University of Technology Yogyakarta.