Cita APA (7th ed.)
Clark, G. (1961). World prehistory: An outline. University Press.
Cita Chicago (17th ed.)
Clark, Grahame. World Prehistory: An Outline. Cambridge: University Press, 1961.
Cita MLA (9th ed.)
Clark, Grahame. World Prehistory: An Outline. University Press, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.