Cita APA (7a ed.)

Ricker, J., & Saywell, J. (1980). Rome: A state in arms (3. ed.). Clarke, Irwin.

Cita Chicago Style (17a ed.)

Ricker, John, y John Saywell. Rome: A State in Arms. 3. ed. Toronto [u.a.]: Clarke, Irwin, 1980.

Cita MLA (9a ed.)

Ricker, John, y John Saywell. Rome: A State in Arms. 3. ed. Clarke, Irwin, 1980.