KAGAN, D. (1962). Decline and fall of the Roman empire: Why did it collapse? D.C. Heath.
Chicago-čujuhus (17. p.)KAGAN, Donald. Decline and Fall of the Roman Empire: Why Did It Collapse? Boston: D.C. Heath, 1962.
MLA-čujuhus (9. p.)KAGAN, Donald. Decline and Fall of the Roman Empire: Why Did It Collapse? D.C. Heath, 1962.
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