GINTING, Mega Henia Br; LEE, Francka Sakti. Design and Implementation of a Stock Purchase System for Printing Businesses Using the Waterfall Method. Journal of Information Systems and Informatics, [S. l.], v. 7, n. 2, p. 1023–1041, 2025. DOI: 10.51519/journalisi.v7i2.1057. Disponível em: https://www.journal-isi.org/index.php/isi/article/view/1057. Acesso em: 7 mar. 2026.