Web Based Information System of Sales and Purchases on Cafe. Jurnal Manajemen Informatika (JAMIKA), [S. l.], v. 9, n. 2, p. 104–113, 2019. DOI: 10.34010/jamika.v9i2.2168. Disponível em: https://ojs.unikom.ac.id/index.php/jamika/article/view/2168. Acesso em: 4 jul. 2025.