Alberto Acosta, A., Alvarez Umaña, D. A., Sánchez Gómez, P. S., Zepeda de Laínez, G. D., & Garay Salinas, R. Oral proficiency level required by the Main Call Centers in El Salvador, 2011-2012.

Alberto Acosta, Arely, David Alexander Alvarez Umaña, Priscila Saraí Sánchez Gómez, Gilma Delfina Zepeda de Laínez, and Ricardo Garay Salinas. Oral Proficiency Level Required By the Main Call Centers in El Salvador, 2011-2012.

Alberto Acosta, Arely, et al. Oral Proficiency Level Required By the Main Call Centers in El Salvador, 2011-2012.