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, Cyrus R. Edmonds (1863). “Three Books of Offices; Or, Moral Duties: Also His Cato Major, an Essay on Old Age; Laelius, an Essay on Friendship; Paradoxes; Scipio's Dream; and Letter to Quintus on the Duties of a Magistrate. Literally Translated, with Notes, Designed to Exhibit a Comparative View of the Opinions of Cicero, and Those of Modern Moralists and Ethical Philosophers”, p.50
Marcus Tullius Cicero (1755). “M.T. Cicero, His Offices: Or, His Treatise Concerning the Moral Duties of Mankind; His Cato Major, Concerning the Means of Making Old Age Happy; His Laelius, Concerning Friendship; His Moral Paradoxes; The Vision of Scipio, Concerning a Future State; His Letter Concerning the Duties of a Magistrate. With Notes Historical and Explanatory”, p.53
Marcus Tullius Cicero (1856). “Cicero's Three books of Offices: or, Moral duties. Also his Cato Major, an essay on old age; Laelius, an essay on friendship; Paradoxes; Scipio's dream; and Letter to Quintus on the duties of a magistrate”, p.249