Viáfara, J. J. (2013). Comparing L1 With L2 Acquisition: How Learning Factors and Stages Reveal Differences and Similarities Between the Two Processes. Universidad Pedagógica y Tecnológica de Colombia.
Chicago-čujuhus (17. p.)Viáfara, John Jairo. Comparing L1 With L2 Acquisition: How Learning Factors and Stages Reveal Differences and Similarities Between the Two Processes. Universidad Pedagógica y Tecnológica de Colombia, 2013.
MLA-čujuhus (9. p.)Viáfara, John Jairo. Comparing L1 With L2 Acquisition: How Learning Factors and Stages Reveal Differences and Similarities Between the Two Processes. Universidad Pedagógica y Tecnológica de Colombia, 2013.
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