Analisis Tingkat Kualitas Pelayanan dengan Pendekatan Servqual dan Importance Performance Analysis (IPA) (Studi Kasus: PDAM Tirta Manggar Balikpapan). Jurnal Teknik Industri (JATRI), [S. l.], v. 3, n. 2, p. 40–53, 2025. DOI: 10.30872/c4m5c380. Disponível em: http://e-journals2.unmul.ac.id/index.php/jatri/article/view/3216. Acesso em: 12 oct. 2025.