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Al Rifqi, Mufid Gilang (2026) Peran Humas Dalam Menangani Pengaduan Pelanggan Sebagai Upaya Peningkatan Kualitas Layanan Di Perumda Delta Tirta Kabupaten Sidoarjo. (The Role of Public Relations in Supporting Customer Complaints as an Effort to Improve Service Quality at Perumda Delta Tirta Sidoarjo Regency). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.