Cita APA (7th ed.)

Clark, G. (1961). World prehistory: An outline. Cambridge University Press.

Cita Chicago (17th ed.)

Clark, Grahame. World Prehistory: An Outline. Londres: Cambridge University Press, 1961.

Cita MLA (9th ed.)

Clark, Grahame. World Prehistory: An Outline. Cambridge University Press, 1961.