@book{77850,
	author = {Beringue P., Francisco},
	title = {Estudios de mercado y de opinión pública},
	publisher = {Ediciones Rosaristas},
	year = {1967},
	series = {Colección Principe},
	address = {Bogotá (Colombia)},
	edition = {2a. ed.(corr y aum)}
}