@book{31693,
	author = {Vela Pulido, Janneth.},
	title = {Como escribir ensayos? /},
	publisher = {Universidad Sergio Arboleda,},
	year = {2007.},
	series = {Cuadernillos serie gramatica ;},
	address = {Bogotá :},
	edition = {2a ed.},
	note = {Incluye indice.}
}