@book{5994,
	author = {Glover, David and Ruíz, Francisco},
	title = {Tiempo},
	publisher = {Educar},
	year = {2008},
	series = {Diviértete con la ciencia},
	address = {Bogotá},
	edition = {8a. reimpresión },
	note = {Incluye índice y glosario }
}