LEEDY, P. D.; ORMROD, J. E. Practical Research: Planning and Design. Eighth edition. Education Review, [S. l.], 2015. DOI: 10.14507/er.v0.917. Disponível em: https://edrev.asu.edu/index.php/ER/article/view/917. Acesso em: 23 feb. 2024.