Morales-Ramírez, María, and Margarita Villalobos-Cordero. “The Impact of Bullying in the Integral Development and Learning from the Perspective of Children in Preschool and School”. Revista Electrónica Educare 21, no. 3 (August 1, 2017): 1-20. Accessed December 2, 2022. https://www.revistas.una.ac.cr/index.php/EDUCARE/article/view/7816.