Gutiérrez P, A. M. ., M. Vergara A, E. Cortés I, and R. Chacón P. “The Professional Knowledge of an Early Childhood Educator: Analysis of the Elements That Enable Its Understanding”. Papeles, vol. 5, no. 9, Sept. 2013, pp. 45-53, https://revistas.uan.edu.co/index.php/papeles/article/view/569.