@book{96479,
	author = {Ratzinger, Joseph},
	title = {Introducción al cristianismo},
	publisher = {Ediciones Sigueme},
	year = {1979.},
	series = {Pedal},
	address = {Salamanca},
	edition = {4. ed.},
	note = {Translation of: Einführung in das Christentum.}
}