Cita APA (7a ed.)

Kagan, D. (1962). Decline and fall of the Roman Empire: why did it collapse?.: Why did it collapse? Heath.

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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