@book{3100,
	author = {Calderón F, Boanerges},
	title = {Costos de servicios /},
	publisher = {Codeu,},
	year = {2008.},
	series = {( Educación y desarrollo ) },
	address = {Ecuador :},
	edition = {Primera edición.},
	note = {Incluye índice.}
}