Ortiz Colon, Ana Maria, Inés María Muñoz Galiano, and María Jesús Colmenero-Ruiz. “Impact of the Flipped Classroom Model and Collaborative Learning in Childhood Teaching University Degree”. Journal of e-Learning and Knowledge Society 13, no. 3 (September 30, 2017). Accessed October 20, 2019. https://www.je-lks.org/ojs/index.php/Je-LKS_EN/article/view/1358.