Sujarwo, Sujarwo, and Muhammad Fathoni. “Validasi International Standard Book Number Dengan Aritmetika Modulo”. REMIK: Riset dan E-Jurnal Manajemen Informatika Komputer 7, no. 3 (August 4, 2023): 1439-1447. Accessed July 27, 2024. https://jurnal.polgan.ac.id/index.php/remik/article/view/12736.