Mahdzar, Mazlina, Muhammad Zahid Mohd Ridzuan, Farah Hanani Mohd Isa, Nur Hidayat Nazrul Fitri, Nur Izzyanie Najihah Zahilan, and Wonyeop Kim. 2021. “Telecommunication: Travel Portable Data (TPD)”. Multidisciplinary Applied Research and Innovation 2 (3):150-53. https://publisher.uthm.edu.my/periodicals/index.php/mari/article/view/5085.