Calderón-Pita, Mercedes, Nancy Bolaños-Rodríguez, Erika de la Torre, and Efrén Viteri-Chiriboga. “Project-Based Learning As a Method to Develop Soft Skills in Four-Year-Old Infants”. South Eastern European Journal of Public Health (November 5, 2024): 1160–1165. Accessed October 12, 2025. https://www.seejph.com/index.php/seejph/article/view/2009.