Cita APA (7th ed.)
Brain, J. P., Breeden, R. L., & Stuart, G. E. Clues to America's Past. National Geographic Society, Special Publications Division.
Cita Chicago (17th ed.)
Brain, Jeffrey P., Robert L. Breeden, i George E. Stuart. Clues to America's Past. Washington, EUA: National Geographic Society, Special Publications Division.
Cita MLA (9th ed.)
Brain, Jeffrey P., et al. Clues to America's Past. National Geographic Society, Special Publications Division.
Atenció: Aquestes cites poden no estar 100% correctes.