Aguilar Yac, J. F., Bernal Aquino, L. S., Burgos Torres, R. A., Corleto Berganza, J. R., Hernàndez Portillo, S. M., & Molina Guerra, S. V. (2011). A study of intensive intermediate english II students' oral perfomance inside the english courses at the Western Multidisciplinary Campus of the University of El Salvador during the year 2011. Santa Ana, El Salvador: Universidad de El Salvador.

Aguilar Yac, Jazmìn Fabiola, Lilie Steffany Bernal Aquino, Ronald Alberto Burgos Torres, José Rigoberto Corleto Berganza, Stefany Mariel Hernàndez Portillo, and Sandra Verònica Molina Guerra. A Study of Intensive Intermediate English II Students' Oral Perfomance Inside the English Courses At the Western Multidisciplinary Campus of the University of El Salvador During the Year 2011. Santa Ana, El Salvador: Universidad de El Salvador, 2011.

Aguilar Yac, Jazmìn Fabiola, et al. A Study of Intensive Intermediate English II Students' Oral Perfomance Inside the English Courses At the Western Multidisciplinary Campus of the University of El Salvador During the Year 2011. Santa Ana, El Salvador: Universidad de El Salvador, 2011.