APA (7th ed.) Citation

Duff, A. M. (1928). Freedmen in the early Roman empire. The Clarendon Press.

Chicago Style (17th ed.) Citation

Duff, A. M. Freedmen in the Early Roman Empire. Oxford: The Clarendon Press, 1928.

MLA (8th ed.) Citation

Duff, A. M. Freedmen in the Early Roman Empire. The Clarendon Press, 1928.