@book{37176,
	author = {Bunge, Mario,  and Sacristán, Manuel, },
	title = {La investigación científica },
	publisher = {Ariel, },
	year = {[1975]},
	series = {Colección convivium},
	address = {Esplugues de Llobregat : },
	edition = {[4ª ed.].}
}