Trigger, B. G. (1968). Beyond history: The methods of prehistory. Holt, Rinehart and Winston.
Lua i Stíl Chicago (17ú heag.)Trigger, Bruce G. Beyond History: The Methods of Prehistory. New York: Holt, Rinehart and Winston, 1968.
Lua MLA (9ú heag.)Trigger, Bruce G. Beyond History: The Methods of Prehistory. Holt, Rinehart and Winston, 1968.
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