تطور الكف المعرفي لدى الاطفال . Journal Of Educational and Psychological Researches, [S. l.], v. 6, n. 20, p. 35–59, 2009. Disponível em: https://www.jperc.uobaghdad.edu.iq/index.php/jperc/article/view/745. Acesso em: 5 jul. 2025.