HEIMLICH, J. E. .; STORKSDIECK, M. Think Piece. Changing Thinking about Learning for a Changing World. Southern African Journal of Environmental Education, [S. l.], v. 24, 2007. DOI: 10.4314/sajee.v24i0.195749. Disponível em: https://www.ajol.info/index.php/sajee/article/view/195749. Acesso em: 11 oct. 2026.