Cita APA (7th ed.)

Clark, G. (1969). World prehistory: A new outline (2nd ed.). C.U. Pr..

Cita Chicago (17th ed.)

Clark, Grahame. World Prehistory: A New Outline. 2nd ed. Cambridge: C.U. Pr., 1969.

Cita MLA (9th ed.)

Clark, Grahame. World Prehistory: A New Outline. 2nd ed. C.U. Pr., 1969.