Tierney, B. (1999). The middle ages: Sources of medieval history. McGraw - Hill.
Chicago-čujuhus (17. p.)Tierney, Brian. The Middle Ages: Sources of Medieval History. New York: McGraw - Hill, 1999.
MLA-čujuhus (9. p.)Tierney, Brian. The Middle Ages: Sources of Medieval History. McGraw - Hill, 1999.
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