Hardiko, Nova Dwi, and Abdul Rohman. “Implementation of Website-Based Student Attendance System Using Codelgniter Framework at NU Ungaran Vocational High School”. Journal of Information Systems and Informatics 6, no. 4 (December 31, 2024): 2679–2692. Accessed March 7, 2026. https://www.journal-isi.org/index.php/isi/article/view/916.