Cita APA (7th ed.)

Kelly, C. (2006). The Roman Empire: A very short introduction. Oxford University Press.

Cita Chicago (17th ed.)

Kelly, Christopher. The Roman Empire: A Very Short Introduction. Oxford; New York: Oxford University Press, 2006.

Cita MLA (8th ed.)

Kelly, Christopher. The Roman Empire: A Very Short Introduction. Oxford University Press, 2006.