Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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