Marcus Tullius Cicero, Pierre-Joseph Thoulier Olivet, Alexander WISHART (1750). “Thoughts of Cicero, on the following subjects, viz. I. Religion, II. Man ... XII. Miscellaneous thoughts. Published in Latin and French by the Abbé d'Olivet; to which is now added, an English translation, with notes. [By Alexander Wishart.]”, p.73
Marcus Tullius Cicero (1857). “Cicero's Three Books of Offices: Or Moral Duties; Also His Cato Major ... Laelius ... Paradoxes; Scipio's Dream; and Letter to Quintus on the Duties of a Magistrate. Literally Tr., with Notes ...”, p.311
Marcus Tullius Cicero, Pliny (2010). “Letters of Marcus Tullius Cicero with His Treatises on Friendship and Old Age: Letters of Pliny the Younger”, p.42, Cosimo, Inc.