NAJDA-JANOSZKA, M. EU ECOLABEL IN TOURISM INDUSTRY. Acta Scientiarum Polonorum. Oeconomia, [S. l.], v. 9, n. 4, p. 333–343, 2010. Disponível em: https://aspe.sggw.edu.pl/article/view/641. Acesso em: 22 nov. 2024.