Ruiz Hernández, C.
(2015).
 An Experimental Evaluation of Vygotsky's Zone of Proximal Development.
<em>CIENCIA ergo-sum, 22</em>(2), 167-171.
Retrieved from <a href="https://cienciaergosum.uaemex.mx/article/view/7719" target="_new">https://cienciaergosum.uaemex.mx/article/view/7719</a>