Cita APA (7th ed.)
Stuart, G. E. (1969). Discovering man's past in the Americas. National Geographic Society.
Cita Chicago (17th ed.)
Stuart, George E. Discovering Man's Past in the Americas. Washington: National Geographic Society, 1969.
Cita MLA (9th ed.)
Stuart, George E. Discovering Man's Past in the Americas. National Geographic Society, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.