AB. LLAH, M. A., and S. MOHD. YASIN. “SISTEM PENGURUSAN FUTSAL CITY NINE: Futsal City Nine Management System”. Applied Information Technology And Computer Science, vol. 3, no. 1, June 2022, pp. 930-46, https://publisher.uthm.edu.my/periodicals/index.php/aitcs/article/view/5206.