Viáfara, John Jairo. «Comparing L1 With L2 Acquisition: How Learning Factors and Stages Reveal Differences and Similarities Between the Two Processes». Enletawa Journal, no. 3 Jan (mayo 31, 2013). Accedido abril 1, 2025. https://revistas.uptc.edu.co/index.php/enletawa_journal/article/view/1944.