@book{24523,
	author = {Sarwar, Syed Mansoor and Sarwar, Syed Aqell},
	title = {El libro de UNIX /},
	publisher = {Pearson Educación,},
	year = {2002.},
	address = {Madrid :},
	note = {Versión original en inglés: UNIX: the textbook.}
}