Bouchier, E. S., Sardinia in Ancient Times. Oxford, 1917.
Dill, S., Roman Society from Nero to Marcus Aurelius. New York, 1905.
Fowler, W. W., Social Life at Rome in the Age of Cicero. New York, 1909.
Frank, T., An Economic History of Rome. Baltimore, 1920.
Friedländer, L., Roman Life and Manners under the Early Empire (Translation by Freese and Magnus). 4 vols. London and New York, 1908-1913.
V. General Handbooks
Daremberg, Charles, et Saglio, M. E., Dictionnaire des Antiquités Grecques et Romaines. 5 vols. Paris, 1875-1919.
Jones, H. Stuart, Companion to Roman History. Oxford, 1912.
Lübker, F., Reallexikon des klassischen Altertums. Leipzig, 1914.8
Pauly, A. F. von, Wissowa, Georg, Kroll, W., Real-Encyclopaedie der classischen Altertumswissenschaft. 11 vols. (incomplete). Stuttgart, 1894-1922.