APA (7th ed.) Citation

Mommsen, T. E., & Morrison, K. F. (1962). Imperial lives and letters of the eleventh century. Columbia University Press.

Chicago Style (17th ed.) Citation

Mommsen, Theodor Ernst, and Karl F. Morrison. Imperial Lives and Letters of the Eleventh Century. New York: Columbia University Press, 1962.

MLA (9th ed.) Citation

Mommsen, Theodor Ernst, and Karl F. Morrison. Imperial Lives and Letters of the Eleventh Century. Columbia University Press, 1962.