PENLAND, P. R. Learning Development. Journal of Information and Knowledge, [S. l.], v. 14, n. 1, p. 25–35, 1977. DOI: 10.17821/srels/1977/v14i1/50516. Disponível em: https://srels.org/index.php/sjim/article/view/50516. Acesso em: 20 may. 2025.