Aura Luz Duffé-Montalvan, Cristian Valdez, Saandia Ali, Leonardo Contreras Roa. Second language class planning : the stages of teaching-learning as a means of promoting the feeling of pleasure, (13), 60-97. doi: https://doi.org/10.15446/male.n13.89349.
Matices en lenguas extranjeras, Departamento de Lenguas Extranjeras de la Universidad Nacional de Colombia, 2019.
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