HARDIYANTI, T.; PANINGRUM, D.; SUTOPO, A. B. Marketing Mix 9P Strategy in Sustaining a Souvenir Shop Business: Strategi Marketing Mix 9P dalam Mempertahankan Bisnis Toko Souvenir. Indonesian Journal of Innovation Studies, [S. l.], v. 26, n. 3, p. 10.21070/ijins.v26i3.1579, 2025. Disponível em: https://ijins.umsida.ac.id/index.php/ijins/article/view/1579. Acesso em: 14 dec. 2025.