Jereda Mercado, J. R., Ayala, E. N., & Salazar Murcia, P. A. (2005). Main Factors affeting the practice of the English Language out of classrooms among the students of the Bachelor of arts in English Language: Teaching option of the foreign languages Departament of the University of El Salvador. San Salvador, El Salvador: University of El Salvador.

Jereda Mercado, Jaime Ricardo, Edgar Nicolás Ayala, and Pedro Antonio Salazar Murcia. Main Factors Affeting the Practice of the English Language Out of Classrooms Among the Students of the Bachelor of Arts in English Language: Teaching Option of the Foreign Languages Departament of the University of El Salvador. San Salvador, El Salvador: University of El Salvador, 2005.

Jereda Mercado, Jaime Ricardo, Edgar Nicolás Ayala, and Pedro Antonio Salazar Murcia. Main Factors Affeting the Practice of the English Language Out of Classrooms Among the Students of the Bachelor of Arts in English Language: Teaching Option of the Foreign Languages Departament of the University of El Salvador. San Salvador, El Salvador: University of El Salvador, 2005.