@book{33621,
	author = {Bergua Amores, José Angel,},
	title = {Estilos de la investigación social :},
	publisher = {Prensas Universitarias de Zaragoza,},
	year = {[2011]},
	series = {Colección Ciencias Sociales ;},
	address = {Zaragoza, España :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/23471/}
}