MYGA-PIĄTEK, Urszula. The Concept of Sustainable Development in Tourism. Problemy Ekorozwoju, [S. l.], v. 6, n. 1, p. 145–154, 2011. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/4809. Acesso em: 22 dec. 2024.