Cita APA (7a ed.)
De León Portillo, B. d. C., Serrano Villalta, R. d. C., & Glower de Alvarado, A. M. (2010). Factors that influence young and adult students in the learning of english as a second language. Universidad de El Salvador.
Cita Chicago Style (17a ed.)
De León Portillo, Baruc del Carmen, Reina del Carmen Serrano Villalta, y Ana María Glower de Alvarado. Factors That Influence Young and Adult Students in the Learning of English as a Second Language. San Salvador: Universidad de El Salvador, 2010.
Cita MLA (9a ed.)
De León Portillo, Baruc del Carmen, et al. Factors That Influence Young and Adult Students in the Learning of English as a Second Language. Universidad de El Salvador, 2010.
Precaución: Estas citas no son 100% exactas.