López A. Ruth L. Ault: Children’s cognitive development: Piaget’s theory and the process approach Oxford University Press, New York, 1977. - [Internet]. 5 de mayo de 2017 [citado 23 de junio de 2024];(6):101-4. Disponible en: https://revistaestudiostributarios.uchile.cl/index.php/LM/article/view/45953