NUGRAHA, S. S.; DEWI, A. M. The Influence of Marketing Mix on The Increase of Billing Sales Volume in Freedom Internet Cafe, Surakarta . ProBisnis : Jurnal Manajemen, [S. l.], v. 15, n. 5, p. 276–283, 2024. Disponível em: https://ejournal.joninstitute.org/index.php/ProBisnis/article/view/559. Acesso em: 8 may. 2026.