Spencer, R. F. (1965). The native Americans: Prehistory and ethnology of the North American Indians. Harper and Row.
Citace podle Chicago (17th ed.)Spencer, Robert F. The Native Americans: Prehistory and Ethnology of the North American Indians. New York: Harper and Row, 1965.
Citace podle MLA (9th ed.)Spencer, Robert F. The Native Americans: Prehistory and Ethnology of the North American Indians. Harper and Row, 1965.
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