Marcus Tullius Cicero (1750). “Thoughts of Cicero: On the Following Subjects, Viz. I. Religion. II. Man. III. Conscience. IV. The Passions. V. Wisdom. VI. Probity. VII. Eloquence. VIII. Friendship. IX. Old Age. X. Death. XI. Scipio's Dream. XII. Miscellaneous Thoughts”, p.213
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.48
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.52
"Of Old Age". Book by Marcus Tullius Cicero, book 5, section 15, reported in "Cicero on the Art of Growing Old", book by Herbert N. Couch (1959), p. 21,