Okon, Emmanuel Tamuno. “DESIGN AND IMPLEMENTATION OF A SMART STAFF ATTENDANCE SYSTEM USING QR CODE TECHNOLOGY”. Ayden Journal of Intelligent System and Computing 13, no. 2 (May 19, 2025): 1–12. Accessed August 23, 2025. https://aydenjournals.com/index.php/AJISC/article/view/1069.