APA-referens (7:e uppl.)

Abulafia, D. (2004). Italy in the central Middle Ages: 1000-1300. Oxford University Press.

Chicago-referens (17:e uppl.)

Abulafia, David. Italy in the Central Middle Ages: 1000-1300. Oxford ; New York: Oxford University Press, 2004.

MLA-referens (8:e uppl.)

Abulafia, David. Italy in the Central Middle Ages: 1000-1300. Oxford University Press, 2004.