Citazione Stile APA (7a Edizione)

Hartmann, L. M. (1949). The early mediaeval state: Byzantium, Italy, and the West. Philip.

Citazione stile Chigago Style (17a edizione)

Hartmann, Ludo Moritz. The Early Mediaeval State: Byzantium, Italy, and the West. London: Philip, 1949.

Citatione MLA (9a ed.)

Hartmann, Ludo Moritz. The Early Mediaeval State: Byzantium, Italy, and the West. Philip, 1949.