Cita APA (7th ed.)

Tierney, B. (1999). The middle ages: Sources of medieval history. McGraw - Hill.

Cita Chicago (17th ed.)

Tierney, Brian. The Middle Ages: Sources of Medieval History. New York: McGraw - Hill, 1999.

Cita MLA (9th ed.)

Tierney, Brian. The Middle Ages: Sources of Medieval History. McGraw - Hill, 1999.