||Cicero, 106 B.C.–43 B.C.
||On friendship, by Cicero; translated by E. S. Shuckburgh.
||The Harvard classics, edited by Charles W. Eliot.
||New York: P.F. Collier & Son, 1909–14.
||Vol. 9, Part 1, of 51.
||Eliot, Charles William, 1834–1926.
Shuckburgh, Evelyn Shirley, 1843–1906, trans.
||Cicero. On Friendship, translated by E. S. Shuckburgh. Vol. IX, Part 1. The Harvard Classics. New York: P.F. Collier & Son, 1909–14; Bartleby.com, 2001. www.bartleby.com/9/1/. [Date of Printout].