Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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