Marcus Tullius Cicero Quotes about Business
Marcus Tullius Cicero, Clinton Walker Keyes (1992). “Cicero in Twenty-eight Volumes: Cato Maior de Senectute. Laelius de Amicitia. De Divinatione”
Marcus Tullius Cicero (2014). “Delphi Complete Works of Cicero (Illustrated)”, p.3124, Delphi Classics