Portillo Anaya, S. C., Reyes Rojas, C. d. C., & Salazar Murcia, P. A. (2003). Application of oral evaluation techniques focused on the oral performance of students in intermediate intensive english II of the foreign languages Department of the University of El Salvador. San Salvador: Universidad de El Salvador.

Portillo Anaya, Sandra Carolina, Cecilia del Carmen Reyes Rojas, and Pedro Antonio Salazar Murcia. Application of Oral Evaluation Techniques Focused On the Oral Performance of Students in Intermediate Intensive English II of the Foreign Languages Department of the University of El Salvador. San Salvador: Universidad de El Salvador, 2003.

Portillo Anaya, Sandra Carolina, Cecilia del Carmen Reyes Rojas, and Pedro Antonio Salazar Murcia. Application of Oral Evaluation Techniques Focused On the Oral Performance of Students in Intermediate Intensive English II of the Foreign Languages Department of the University of El Salvador. San Salvador: Universidad de El Salvador, 2003.