HŁOBIŁ, Agnieszka. Ecological Education for Sustainable Development – Theory and Practise. Problemy Ekorozwoju, [S. l.], v. 5, n. 2, p. 87–94, 2010. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/4749. Acesso em: 22 dec. 2024.