Accibal, D., J. C. Cudal, H. D. Esiber, and Mr. Erwin P. Concepcion. 2019. “Travel and Tour Management System: Human Resource 3 (Time and Attendance, Shift and Schedule, Timesheet Management, Leave Management, Claims and Reimbursement)”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research 1 (1). https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/2165.