Tampilang, Billy, Keith Francis Ratumbuisang, and Johan Reimon Batmetan. “Analisis Tingkat Kematangan Keamanan Sistem Informasi Universitas Negeri Manado Menggunakan Framework COBIT 2019”. Journal of Education Method and Technology : JEMTech 2, no. 4 (December 1, 2024): 82-89. Accessed July 26, 2025. https://ejurnal.unima.ac.id/index.php/jemtec/article/view/12343.