Agnes, Angelina, and Agustinus Wijaya. “Information System Strategic Planning Using Ward and Peppard Methodology (Case Study: Nusatovel Salatiga)”. Journal of Information Systems and Informatics 2, no. 2 (September 3, 2020): 246-255. Accessed December 19, 2025. https://journal-isi.org.adsii.or.id/index.php/isi/article/view/69.