Djusar, Syahtriatna, Muhamad Sadar, and Elvira Asril. “Analisa Kualitas Layanan Sistem Smart Unilak Menggunakan Servqual Method”. Digital Zone: Jurnal Teknologi Informasi dan Komunikasi 11, no. 2 (November 21, 2020): 278-290. Accessed March 3, 2024. https://journal.unilak.ac.id/index.php/dz/article/view/5331.