APA (7th ed.) Citation

Fried, J., & Lewis, P. (2016). Charlemagne. Harvard University Press.

Chicago Style (17th ed.) Citation

Fried, Johannes, and Peter Lewis. Charlemagne. Cambridge, Massachusetts ; London, England: Harvard University Press, 2016.

MLA (9th ed.) Citation

Fried, Johannes, and Peter Lewis. Charlemagne. Harvard University Press, 2016.