Moscoso, Y., H. Carrión, L. González, D. Chirú, R. Muñoz, and A. Sarco. “Influence of Endogenous and Exogenous Factors on the Learning Process of Preschool Children, According to Vygotsky’s Sociocultural Theory”. Revista Semilla Científica, no. 1, Apr. 2020, pp. 340-8, https://revistas.umecit.edu.pa/index.php/sc/article/view/1010.