Che Pa, Noraini, Raziera Bidin, and Azrina Kamaruddin. “A Study of Web Design for Customer Billing Telephony System Using User Experience (UX) Approach”. International Journal of Engineering and Technology 7, no. 4.31 (December 9, 2018): 140–144. Accessed August 17, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/23357.