APA (7th ed.) Citation

Potter, D. S. (2006). A companion to the Roman Empire. Blackwell.

Chicago Style (17th ed.) Citation

Potter, D. S. A Companion to the Roman Empire. Oxford [etc.]: Blackwell, 2006.

MLA (9th ed.) Citation

Potter, D. S. A Companion to the Roman Empire. Blackwell, 2006.

Warning: These citations may not always be 100% accurate.