Marcus Tullius Cicero (1855). “Cicero's Three books of offices, or moral duties: also his Cato Major, an essay on old age; Lælius, an essay on friendship; Paradoxes; Scipio's dream; and Letter to Quintus on the duties of a magistrate”, p.42
Ben Jonson, Margaret Jane Kidnie (2000). “Poetaster, Or, The Arraignment: Sejanus His Fall ; The Devil is an Ass ; The New Inn, Or, The Light Heart”, p.59, Oxford : Oxford University Press
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