@book{31018,
	author = {Garcia Ferrrando Manuel and Libreria San Cristobal},
	title = {El análisis de la realidad social metodos y tecnicas de investigacion},
	publisher = {Editorial Alianza},
	year = {2007},
	address = {España},
	edition = {4ta  edicion},
	url = {https://metodo1.sociales.uba.ar/wp-content/uploads/sites/164/2014/10/Garcia-et-al-El-analisis-de-la-realidad-social-metodos-y-tecnicas-de-la-investigacion.pdf}
}