@book{296819,
	author = {Pineda, Elia B. and Alvarado, Eva Luz de},
	title = {Metodología de la investigación / Elia B. Pineda, Eva Luz de Alvarado},
	publisher = {Organización Panamericana de la Salud},
	year = {2008},
	address = {Washington},
	edition = {3ra. ed.}
}