Hernández Polanco, Fernando Enrique and Luna Linares, Cristian Ivan and Pacheco Sigüenza, David Osvaldo and Rodríguez Lizama, Ricardo Humberto (2017) Internal and external factors that hinder first year of high school students' efl learning process at Complejo Educativo, Dr. Alberto Luna, San Sebastian Salitrillo, santa ana, during the year 2017. Bachelor thesis, Universidad de El Salvador.

Hernández Polanco, Fernando Enrique and Luna Linares, Cristian Ivan and Pacheco Sigüenza, David Osvaldo and Rodríguez Lizama, Ricardo Humberto (2017) Internal and external factors that hinder first year of high school students' efl learning process at Complejo Educativo, Dr. Alberto Luna, San Sebastian Salitrillo, Santa Ana, during the year 2017. Other thesis, Universidad de El Salvador.