@book{43906,
	author = {Cicerón, Marco Tulio. and García Yebra, Valentín, },
	title = {De amicitia / },
	publisher = {Gredos, },
	year = {1981.},
	series = {Gredos bilingüe},
	address = {Madrid : },
	edition = {2ª ed. rev.}
}