BARUK, A.; GOLISZEK, A. A VALUABLE NATURAL AREA AS A SYSTEM MARKETING PRODUCT VERSUS EXPECTATIONS OF TOURISTS AS ACTIVE PURCHASERS. Acta Scientiarum Polonorum. Oeconomia, [S. l.], v. 18, n. 1, p. 5–12, 2019. DOI: 10.22630/ASPE.2019.18.1.1. Disponível em: https://aspe.sggw.edu.pl/article/view/214. Acesso em: 6 may. 2024.