ČINČERA, J. The methodology for evaluation of environmental education programmes for pre-school and K-5 elementary school pupils. Envigogika, Praha, Czech Republic, v. 8, n. 5, 2013. DOI: 10.14712/18023061.413. Disponível em: https://www.envigogika.cuni.cz/index.php/Envigogika/article/view/413. Acesso em: 24 oct. 2020.