@book{31865,
	author = {Tennent, John. and Friend, Graham.},
	title = {Como delinear un modelo de negocios /},
	publisher = {Cuatro media,},
	year = {2008.},
	series = {The economist},
	address = {Buenos Aires :},
	note = {Incluye Anexos: funciones de la hoja de cálculos.}
}