Roslan, Balqis, and Nolr Bakiah Abd Warif. “A Secure Booking Appointment System With Graphical Password Authentication for Diva Hair Salon”. Applied Information Technology And Computer Science, vol. 4, no. 2, Nov. 2023, pp. 210-29, https://penerbit.uthm.edu.my/periodicals/index.php/aitcs/article/view/12178.