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Meza Perez, Roger A. and Saborio Norori, José Luis (2011) Analysis of the factors that produce lack of motivation in english class in first year students in the Institute Miguel Bonilla Obando in Villa Austria in Managua during the second semester of 2010. Artículo de trabajo. UNAN-Managua, Managua.
Meza Perez, Roger A. and Mondragon Ramirez, Pedro José (2011) Analysis of the factors that provoke lack of motivation in english class in seventh grade students of the Institute Modesto Armijo Lozano in unidad de proposito Neighborhood in Managua during the first semester of 2011. Otra thesis, Universidad Nacional Autónoma de Nicaragua, Managua.