ČINČERA, J. Methodology of evaluation of environmental education programmes. Envigogika, Praha, Czech Republic, v. 5, n. 3, 2010. DOI: 10.14712/18023061.149. Disponível em: https://envigogika.cuni.cz/index.php/Envigogika/article/view/149. Acesso em: 21 sep. 2020.