APA-viite (7. p.)

KAGAN, D. (1962). Decline and fall of the Roman empire: Why did it collapse? D.C. Heath.

Chicago-viite (17. p.)

KAGAN, Donald. Decline and Fall of the Roman Empire: Why Did It Collapse? Boston: D.C. Heath, 1962.

MLA-viite (9. p.)

KAGAN, Donald. Decline and Fall of the Roman Empire: Why Did It Collapse? D.C. Heath, 1962.