Sugiarni, Ni Luh Manik, Dian Pramana, and Ni Nyoman Harini Puspita. 2015. “Implementasi CRM (Customer Relationship Management) Pada Sistem Informasi Travel X Berbasis Web”. Jurnal Sistem Dan Informatika (JSI) 9 (2), 51-59. https://jsi.stikom-bali.ac.id/index.php/jsi/article/view/26.