APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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