@book{21245,
	author = {Mullor, Rubén and Fajardo, María Dolores},
	title = {Manual práctico de estadística aplicada a las ciencias sociales},
	publisher = {Ariel},
	year = {2000},
	series = {Ariel Practicum},
	address = {Barcelona},
	edition = {1ª ed.}
}