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.
芝加哥风格引文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引文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.
警告：这些引文格式不一定是100％准确.
