@book{13666,
	author = {Latham-Koenig ,Christina and Oxenden , Clive y Seligson , Paul (coautores) },
	title = {American English File: Workbook Volumen 2B },
	publisher = {Oxford ,},
	year = {2020},
	address = {Estados Unidos :},
	edition = {2a.ed. }
}