Sánchez Hernández, Gabriela, and Walter Alberto Calzato. “The Four Pillars of Learning and the Use of Portfolios As Learning Tasks and Qualitative Assessment Tools. A Reflection about Teaching and Learning”. Revista Docencia Universitaria 16, no. 1 (December 8, 2015): 65–86. Accessed July 22, 2024. https://revistas.uis.edu.co/index.php/revistadocencia/article/view/5952.