Portillo Martínez, . L. G., García alemán, . O. M., Menéndez Girón, . K. J., Cruz, J. C., & Contreras, M. S. Productive skills difficulties that students in the Current courses served in semester II, 2019 face within the skill development area at the Department of the Foreign Languages of the University of El Salvador.

Portillo Martínez, Luis Gonzalo, Omar Mauricio García alemán, Kevin Josué Menéndez Girón, Juan Carlos Cruz, and Mauricio Salvador Contreras. Productive Skills Difficulties That Students in the Current Courses Served in Semester II, 2019 Face Within the Skill Development Area At the Department of the Foreign Languages of the University of El Salvador.

Portillo Martínez, Luis Gonzalo, et al. Productive Skills Difficulties That Students in the Current Courses Served in Semester II, 2019 Face Within the Skill Development Area At the Department of the Foreign Languages of the University of El Salvador.