Cita APA (7a ed.)

National Geographic Society., Carroll, A., & Shupe, J. F. (1997). The Roman Empire: Great peoples of the past. National Geographic Society.

Cita Chicago Style (17a ed.)

National Geographic Society., Allen Carroll, y John F. Shupe. The Roman Empire: Great Peoples of the Past. Washington, D.C.: National Geographic Society, 1997.

Cita MLA (9a ed.)

National Geographic Society., et al. The Roman Empire: Great Peoples of the Past. National Geographic Society, 1997.