Hanif, Muhammad Rakha Miftahhul, Fathurohman Fathurohman, and Akda Zahrotul Wathoni. “Analisis Kepuasan Pelanggan Terhadap Pelayanan Kinerja Citygas Dengan Metode Servqual Customer Satisfaction Index Dan Importance Performance Analysis”. Matrik : Jurnal Manajemen dan Teknik Industri Produksi 25, no. 1 (September 30, 2024): 79–92. Accessed June 3, 2025. https://journal.umg.ac.id/index.php/matriks/article/view/8179.