FERRARI, S.; PRATESI, C. A. National parks in Italy: Sustainable tourism marketing strategies. Matkailututkimus, [S. l.], v. 8, n. 1, p. 7–23, 2012. Disponível em: https://journal.fi/matkailututkimus/article/view/90868. Acesso em: 3 touko. 2024.