Pratiwi, M. R., . F. S. Jumeilah, and F. Noprian. “Sistem Informasi Customer Relationship Management Pada Hotel Grand Malaka Ethical Palembang Berbasis Web”. Journal of Information Technology Ampera, vol. 1, no. 2, Aug. 2020, pp. 61-74, https://www.journal-computing.org/index.php/journal-ita/article/view/25.