APA (7th ed.) Citation

Hartmann, L. M., & Liebeschütz, H. (1949). The Early medieval state, Byzantium, Italy, and the West. Historical Association.

Chicago Style (17th ed.) Citation

Hartmann, Ludo Moritz, and Hans Liebeschütz. The Early Medieval State, Byzantium, Italy, and the West. London: Historical Association, 1949.

MLA (9th ed.) Citation

Hartmann, Ludo Moritz, and Hans Liebeschütz. The Early Medieval State, Byzantium, Italy, and the West. Historical Association, 1949.

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