Ahmad Daud, Ain Farhadhia, and Azizul Azhar Ramli. “Sistem Pengurusan Kehadiran Dan Kebenaran Kerja Yacaya Enterprise (PKKKYE)”. Applied Information Technology And Computer Science, vol. 3, no. 2, Nov. 2022, pp. 1604-17, https://penerbit.uthm.edu.my/periodicals/index.php/aitcs/article/view/7365.