Azizi, Nur Afrina Aida, and Nurezayana Zainal. “The Development of ISafe Mobile Application Using Messaging and GPS System”. Applied Information Technology And Computer Science 2, no. 2 (November 29, 2021): 1406–1418. Accessed June 29, 2022. https://publisher.uthm.edu.my/periodicals/index.php/aitcs/article/view/2250.