Acquisition of sibling and family concepts: A Piagetian study. Global Journal of Psychology Research: New Trends and Issues, [S. l.], v. 7, n. 3, p. 125–133, 2017. DOI: 10.18844/gjpr.v7i3.2858. Disponível em: https://un-pub.eu/ojs/index.php/gjpr/article/view/2858. Acesso em: 14 may. 2024.