ALGHAIL, A.A.M.M. and khaled, S. (2025) “A Secure Online Booking System with OTP for Sultans Spa Resort”, Applied Information Technology And Computer Science, 6(1), pp. 663–682. Available at: https://penerbit.uthm.edu.my/periodicals/index.php/aitcs/article/view/18872 (Accessed: 8 April 2026).