APA (7th ed.) Citation

O'Donnell, J. J. (2008). The ruin of the Roman Empire. HarperCollins.

Chicago Style (17th ed.) Citation

O'Donnell, James J. The Ruin of the Roman Empire. New York: HarperCollins, 2008.

MLA (9th ed.) Citation

O'Donnell, James J. The Ruin of the Roman Empire. HarperCollins, 2008.

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