@book{41521,
	author = {Borda Pérez, Mariela and Tuesca Molina, Rafael},
	title = {Métodos cuantitativos :},
	publisher = {Ecoe,},
	year = {2013},
	address = {Estados Unidos de América :},
	edition = {4},
	url = {http://biblioteca.unac.edu.co/portadas/55915.jpg}
}