@book{130806,
	author = {Guevara de la Serna, Ernesto, and Fernández Retamar, Roberto},
	title = {Obra revolucionaria},
	publisher = {Ediciones Era},
	year = {1974, c1967.},
	series = {El Hombre y su tiempo},
	address = {México},
	edition = {6. ed.}
}