FALK, J. H.; DIERKING, L. D. Lessons Without Limit: How Free-Choice Learning is Transforming Education. Education Review, [S. l.], 2015. DOI: 10.14507/er.v0.287. Disponível em: https://edrev.asu.edu/index.php/ER/article/view/287. Acesso em: 2 may. 2024.